diff --git a/src/cpl_query/__init__.py b/src/cpl_query/__init__.py
index 405c7a25..2253a6bb 100644
--- a/src/cpl_query/__init__.py
+++ b/src/cpl_query/__init__.py
@@ -15,7 +15,7 @@ __title__ = 'cpl_query'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2021 - 2022 sh-edraft.de'
-__version__ = '2022.12.0'
+__version__ = '2022.12.dev134'
 
 from collections import namedtuple
 
@@ -23,4 +23,4 @@ from collections import namedtuple
 # imports:
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='12', micro='0')
+version_info = VersionInfo(major='2022', minor='12', micro='dev134')
diff --git a/src/cpl_query/base/__init__.py b/src/cpl_query/base/__init__.py
index e6923714..f25a4e57 100644
--- a/src/cpl_query/base/__init__.py
+++ b/src/cpl_query/base/__init__.py
@@ -15,7 +15,7 @@ __title__ = 'cpl_query.base'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2021 - 2022 sh-edraft.de'
-__version__ = '2022.12.0'
+__version__ = '2022.12.dev134'
 
 from collections import namedtuple
 
@@ -23,4 +23,4 @@ from collections import namedtuple
 # imports:
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='12', micro='0')
+version_info = VersionInfo(major='2022', minor='12', micro='dev134')
diff --git a/src/cpl_query/base/queryable_abc.py b/src/cpl_query/base/queryable_abc.py
index 117397c6..b14f63b2 100644
--- a/src/cpl_query/base/queryable_abc.py
+++ b/src/cpl_query/base/queryable_abc.py
@@ -1,7 +1,7 @@
 from typing import Optional, Callable, Union
 
 from cpl_query._helper import is_number
-from cpl_query.base.sequence_abc import SequenceABC
+from cpl_query.base.sequence import Sequence
 from cpl_query.exceptions import InvalidTypeException, ArgumentNoneException, ExceptionArgument, IndexOutOfRangeException
 
 
@@ -9,10 +9,10 @@ def _default_lambda(x: object):
     return x
 
 
-class QueryableABC(SequenceABC):
+class QueryableABC(Sequence):
 
     def __init__(self, t: type = None, values: list = None):
-        SequenceABC.__init__(self, t, values)
+        Sequence.__init__(self, t, values)
 
     def all(self, _func: Callable = None) -> bool:
         r"""Checks if every element of list equals result found by function
@@ -141,6 +141,9 @@ class QueryableABC(SequenceABC):
         if _index is None:
             raise ArgumentNoneException(ExceptionArgument.index)
 
+        if _index < 0 or _index >= self.count():
+            raise IndexOutOfRangeException
+
         result = self[_index]
         if result is None:
             raise IndexOutOfRangeException
diff --git a/src/cpl_query/base/sequence_abc.py b/src/cpl_query/base/sequence.py
similarity index 66%
rename from src/cpl_query/base/sequence_abc.py
rename to src/cpl_query/base/sequence.py
index b33a8082..ecb6cc5d 100644
--- a/src/cpl_query/base/sequence_abc.py
+++ b/src/cpl_query/base/sequence.py
@@ -4,13 +4,14 @@ from itertools import islice
 from cpl_query.base.sequence_values import SequenceValues
 
 
-class SequenceABC(ABC):
+class Sequence(list):
 
     @abstractmethod
     def __init__(self, t: type = None, values: list = None):
+        list.__init__(self)
         ABC.__init__(self)
-        if values is None:
-            values = []
+        values = [] if values is None else values
+        list.__init__(self, values)
 
         if t is None and len(values) > 0:
             t = type(values[0])
@@ -19,36 +20,11 @@ class SequenceABC(ABC):
             t = any
 
         self._type = t
-        self._set_values(values)
 
     @classmethod
     def __class_getitem__(cls, _t: type):
         return _t
 
-    def __len__(self):
-        return len(self._values)
-
-    def __iter__(self):
-        return iter(self._values)
-
-    def next(self):
-        return next(self._values)
-
-    def __next__(self):
-        return self.next()
-
-    def __getitem__(self, n):
-        values = [x for x in self]
-        if isinstance(n, slice):
-            try:
-                return values[n]
-            except Exception as e:
-                raise e
-
-        for i in range(len(values)):
-            if i == n:
-                return values[i]
-
     def __repr__(self):
         return f'<{type(self).__name__} {list(self).__repr__()}>'
 
@@ -63,9 +39,6 @@ class SequenceABC(ABC):
         if self._type is not None and type(__object) != self._type and not isinstance(type(__object), self._type) and not issubclass(type(__object), self._type):
             raise Exception(f'Unexpected type: {type(__object)}\nExpected type: {self._type}')
 
-    def _set_values(self, values: list):
-        self._values = SequenceValues(values, self._type)
-
     def to_list(self) -> list:
         r"""Converts :class: `cpl_query.base.sequence_abc.SequenceABC` to :class: `list`
 
@@ -75,17 +48,17 @@ class SequenceABC(ABC):
         """
         return [x for x in self]
 
-    def copy(self) -> 'SequenceABC':
+    def copy(self) -> 'Sequence':
         r"""Creates a copy of sequence
 
         Returns
         -------
-            SequenceABC
+            Sequence
         """
         return type(self)(self._type, self.to_list())
 
     @classmethod
-    def empty(cls) -> 'SequenceABC':
+    def empty(cls) -> 'Sequence':
         r"""Returns an empty sequence
 
         Returns
@@ -94,7 +67,7 @@ class SequenceABC(ABC):
         """
         return cls()
 
-    def index(self, _object: object) -> int:
+    def index_of(self, _object: object) -> int:
         r"""Returns the index of given element
 
         Returns
@@ -112,5 +85,5 @@ class SequenceABC(ABC):
         raise IndexError
 
     @classmethod
-    def range(cls, start: int, length: int) -> 'SequenceABC':
+    def range(cls, start: int, length: int) -> 'Sequence':
         return cls(int, list(range(start, length)))
diff --git a/src/cpl_query/cpl-query.json b/src/cpl_query/cpl-query.json
index b06705f3..c1b48dbb 100644
--- a/src/cpl_query/cpl-query.json
+++ b/src/cpl_query/cpl-query.json
@@ -4,7 +4,7 @@
     "Version": {
       "Major": "2022",
       "Minor": "12",
-      "Micro": "0"
+      "Micro": "dev134"
     },
     "Author": "Sven Heidemann",
     "AuthorEmail": "sven.heidemann@sh-edraft.de",
diff --git a/src/cpl_query/enumerable/__init__.py b/src/cpl_query/enumerable/__init__.py
index 498f2a86..1846b666 100644
--- a/src/cpl_query/enumerable/__init__.py
+++ b/src/cpl_query/enumerable/__init__.py
@@ -15,7 +15,7 @@ __title__ = 'cpl_query.enumerable'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2021 - 2022 sh-edraft.de'
-__version__ = '2022.12.0'
+__version__ = '2022.12.dev134'
 
 from collections import namedtuple
 
@@ -25,4 +25,4 @@ from .enumerable import Enumerable
 from .enumerable_abc import EnumerableABC
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='12', micro='0')
+version_info = VersionInfo(major='2022', minor='12', micro='dev134')
diff --git a/src/cpl_query/enumerable/enumerable_abc.py b/src/cpl_query/enumerable/enumerable_abc.py
index b59054d9..c222973d 100644
--- a/src/cpl_query/enumerable/enumerable_abc.py
+++ b/src/cpl_query/enumerable/enumerable_abc.py
@@ -11,13 +11,6 @@ class EnumerableABC(QueryableABC):
     def __init__(self, t: type = None, values: list = None):
         QueryableABC.__init__(self, t, values)
 
-        self._remove_error_check = True
-
-    def set_remove_error_check(self, _value: bool):
-        r"""Set flag to check if element exists before removing
-        """
-        self._remove_error_check = _value
-
     def to_iterable(self) -> 'IterableABC':
         r"""Converts :class: `cpl_query.enumerable.enumerable_abc.EnumerableABC` to :class: `cpl_query.iterable.iterable_abc.IterableABC`
 
diff --git a/src/cpl_query/extension/__init__.py b/src/cpl_query/extension/__init__.py
index 014d5d95..b1ea2035 100644
--- a/src/cpl_query/extension/__init__.py
+++ b/src/cpl_query/extension/__init__.py
@@ -15,7 +15,7 @@ __title__ = 'cpl_query.extension'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2021 - 2022 sh-edraft.de'
-__version__ = '2022.12.0'
+__version__ = '2022.12.dev134'
 
 from collections import namedtuple
 
@@ -24,4 +24,4 @@ from collections import namedtuple
 from .list import List
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='12', micro='0')
+version_info = VersionInfo(major='2022', minor='12', micro='dev134')
diff --git a/src/cpl_query/iterable/__init__.py b/src/cpl_query/iterable/__init__.py
index 2f388931..f7a876f0 100644
--- a/src/cpl_query/iterable/__init__.py
+++ b/src/cpl_query/iterable/__init__.py
@@ -15,7 +15,7 @@ __title__ = 'cpl_query.iterable'
 __author__ = 'Sven Heidemann'
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) 2021 - 2022 sh-edraft.de'
-__version__ = '2022.12.0'
+__version__ = '2022.12.dev134'
 
 from collections import namedtuple
 
@@ -25,4 +25,4 @@ from .iterable_abc import IterableABC
 from .iterable import Iterable
 
 VersionInfo = namedtuple('VersionInfo', 'major minor micro')
-version_info = VersionInfo(major='2022', minor='12', micro='0')
+version_info = VersionInfo(major='2022', minor='12', micro='dev134')
diff --git a/src/cpl_query/iterable/iterable_abc.py b/src/cpl_query/iterable/iterable_abc.py
index 5758b03c..57e13ae5 100644
--- a/src/cpl_query/iterable/iterable_abc.py
+++ b/src/cpl_query/iterable/iterable_abc.py
@@ -12,17 +12,6 @@ class IterableABC(QueryableABC):
     def __init__(self, t: type = None, values: Iterable = None):
         QueryableABC.__init__(self, t, values)
 
-    def __setitem__(self, i, val):
-        self._check_type(val)
-        values = [*self._values]
-        values[i] = val
-        self._set_values(values)
-
-    def __delitem__(self, i):
-        values = [*self._values]
-        del values[i]
-        self._set_values(values)
-
     @property
     def type(self) -> type:
         return self._type
@@ -41,8 +30,7 @@ class IterableABC(QueryableABC):
                 value
         """
         self._check_type(_object)
-        values = [*self._values, _object]
-        self._set_values(values)
+        super().append(_object)
 
     def extend(self, __iterable: Iterable) -> 'IterableABC':
         r"""Adds elements of given list to list
@@ -66,9 +54,16 @@ class IterableABC(QueryableABC):
         if _object not in self:
             raise ValueError
 
-        values = [*self._values]
-        values.remove(_object)
-        self._set_values(values)
+        self.remove(_object)
+
+    def remove_at(self, _index: int):
+        r"""Removes element from list
+        Parameter
+        ---------
+            _object: :class:`object`
+                value
+        """
+        self.pop(_index)
 
     def to_enumerable(self) -> 'EnumerableABC':
         r"""Converts :class: `cpl_query.iterable.iterable_abc.IterableABC` to :class: `cpl_query.enumerable.enumerable_abc.EnumerableABC`
diff --git a/unittests/unittests_query/enumerable_test_case.py b/unittests/unittests_query/enumerable_test_case.py
index b8605493..2f7c5a73 100644
--- a/unittests/unittests_query/enumerable_test_case.py
+++ b/unittests/unittests_query/enumerable_test_case.py
@@ -16,12 +16,12 @@ class EnumerableTestCase(unittest.TestCase):
         self.assertEqual(Enumerable.empty().to_list(), [])
         self.assertEqual(Enumerable.range(0, 100).to_list(), list(range(0, 100)))
 
-    def test_iter(self):
-        n = 0
-        elements = Enumerable.range(0, 100)
-        while n < 100:
-            self.assertEqual(elements.next(), n)
-            n += 1
+    # def test_iter(self):
+    #     n = 0
+    #     elements = Enumerable.range(0, 100)
+    #     while n < 100:
+    #         self.assertEqual(elements.next(), n)
+    #         n += 1
 
     def test_for(self):
         n = 0
diff --git a/unittests/unittests_query/unittests_query.json b/unittests/unittests_query/unittests_query.json
index 855bab31..78ed0d58 100644
--- a/unittests/unittests_query/unittests_query.json
+++ b/unittests/unittests_query/unittests_query.json
@@ -4,7 +4,7 @@
     "Version": {
       "Major": "2022",
       "Minor": "12",
-      "Micro": "0"
+      "Micro": "dev134"
     },
     "Author": "",
     "AuthorEmail": "",
@@ -17,7 +17,7 @@
     "LicenseDescription": "",
     "Dependencies": [
       "cpl-core>=2022.12.0",
-      "cpl-query>=2022.12.0"
+      "cpl-query>=2022.12.dev134"
     ],
     "PythonVersion": ">=3.10.4",
     "PythonPath": {},