diff --git a/stubs/pika/pika/channel.pyi b/stubs/pika/pika/channel.pyi
index fb3c17122..30631f00f 100644
--- a/stubs/pika/pika/channel.pyi
+++ b/stubs/pika/pika/channel.pyi
@@ -1,26 +1,30 @@
 from _typeshed import Incomplete, Self
 from collections.abc import Callable
+from logging import Logger
+from typing import Any
 from typing_extensions import Final
 
 from .callback import CallbackManager
 from .connection import Connection
 from .data import _ArgumentMapping
 from .exchange_type import ExchangeType
-from .frame import Method
-from .spec import Basic, BasicProperties, Exchange
+from .frame import Body, Header, Method
+from .spec import Basic, BasicProperties, Confirm, Exchange, Queue, Tx
 
-LOGGER: Incomplete
-MAX_CHANNELS: int
+LOGGER: Logger
+MAX_CHANNELS: Final[int]
 
 class Channel:
-    CLOSED: Final[int]
-    OPENING: Final[int]
-    OPEN: Final[int]
-    CLOSING: Final[int]
+    CLOSED: Final = 0
+    OPENING: Final = 1
+    OPEN: Final = 2
+    CLOSING: Final = 3
+
     channel_number: int
     callbacks: CallbackManager
     connection: Connection
     flow_active: bool
+
     def __init__(self: Self, connection: Connection, channel_number: int, on_open_callback: Callable[[Self], object]) -> None: ...
     def __int__(self) -> int: ...
     def add_callback(self, callback, replies, one_shot: bool = ...) -> None: ...
@@ -28,7 +32,7 @@ class Channel:
     def add_on_close_callback(self, callback) -> None: ...
     def add_on_flow_callback(self, callback) -> None: ...
     def add_on_return_callback(self, callback) -> None: ...
-    def basic_ack(self, delivery_tag: int = ..., multiple: bool = ...): ...
+    def basic_ack(self, delivery_tag: int = ..., multiple: bool = ...) -> None: ...
     def basic_cancel(
         self, consumer_tag: str = ..., callback: Callable[[Method[Basic.CancelOk]], object] | None = ...
     ) -> None: ...
@@ -42,23 +46,38 @@ class Channel:
         arguments: _ArgumentMapping | None = ...,
         callback: Callable[[Method[Basic.ConsumeOk]], object] | None = ...,
     ) -> str: ...
-    def basic_get(self, queue, callback, auto_ack: bool = ...) -> None: ...
-    def basic_nack(self, delivery_tag: int = ..., multiple: bool = ..., requeue: bool = ...): ...
+    def basic_get(
+        self, queue: str, callback: Callable[[Channel, Basic.GetOk, BasicProperties, bytes], object], auto_ack: bool = ...
+    ) -> None: ...
+    def basic_nack(self, delivery_tag: int = ..., multiple: bool = ..., requeue: bool = ...) -> None: ...
     def basic_publish(
         self, exchange: str, routing_key: str, body: str | bytes, properties: BasicProperties | None = ..., mandatory: bool = ...
     ) -> None: ...
     def basic_qos(
-        self, prefetch_size: int = ..., prefetch_count: int = ..., global_qos: bool = ..., callback: Incomplete | None = ...
-    ): ...
-    def basic_reject(self, delivery_tag: int = ..., requeue: bool = ...): ...
-    def basic_recover(self, requeue: bool = ..., callback: Incomplete | None = ...): ...
+        self,
+        prefetch_size: int = ...,
+        prefetch_count: int = ...,
+        global_qos: bool = ...,
+        callback: Callable[[Method[Basic.QosOk]], object] | None = ...,
+    ) -> None: ...
+    def basic_reject(self, delivery_tag: int = ..., requeue: bool = ...) -> None: ...
+    def basic_recover(self, requeue: bool = ..., callback: Callable[[Method[Basic.RecoverOk]], object] | None = ...) -> None: ...
     def close(self, reply_code: int = ..., reply_text: str = ...) -> None: ...
-    def confirm_delivery(self, ack_nack_callback, callback: Incomplete | None = ...) -> None: ...
+    def confirm_delivery(
+        self,
+        ack_nack_callback: Callable[[Method[Basic.Ack | Basic.Nack]], object],
+        callback: Callable[[Method[Confirm.SelectOk]], object] | None = ...,
+    ) -> None: ...
     @property
-    def consumer_tags(self): ...
+    def consumer_tags(self) -> list[str]: ...
     def exchange_bind(
-        self, destination, source, routing_key: str = ..., arguments: Incomplete | None = ..., callback: Incomplete | None = ...
-    ): ...
+        self,
+        destination: str,
+        source: str,
+        routing_key: str = ...,
+        arguments: _ArgumentMapping | None = ...,
+        callback: Callable[[Method[Exchange.BindOk]], object] | None = ...,
+    ) -> None: ...
     def exchange_declare(
         self,
         exchange: str,
@@ -69,63 +88,69 @@ class Channel:
         internal: bool = ...,
         arguments: _ArgumentMapping | None = ...,
         callback: Callable[[Method[Exchange.DeclareOk]], object] | None = ...,
-    ): ...
+    ) -> None: ...
     def exchange_delete(
         self,
         exchange: str | None = ...,
         if_unused: bool = ...,
         callback: Callable[[Method[Exchange.DeleteOk]], object] | None = ...,
-    ): ...
+    ) -> None: ...
     def exchange_unbind(
         self,
-        destination: Incomplete | None = ...,
-        source: Incomplete | None = ...,
+        destination: str | None = ...,
+        source: str | None = ...,
         routing_key: str = ...,
-        arguments: Incomplete | None = ...,
-        callback: Incomplete | None = ...,
-    ): ...
-    def flow(self, active, callback: Incomplete | None = ...) -> None: ...
+        arguments: _ArgumentMapping | None = ...,
+        callback: Callable[[Method[Exchange.UnbindOk]], object] | None = ...,
+    ) -> None: ...
+    def flow(self, active: bool, callback: Callable[[bool], object] | None = ...) -> None: ...
     @property
-    def is_closed(self): ...
+    def is_closed(self) -> bool: ...
     @property
-    def is_closing(self): ...
+    def is_closing(self) -> bool: ...
     @property
-    def is_open(self): ...
+    def is_open(self) -> bool: ...
     @property
-    def is_opening(self): ...
+    def is_opening(self) -> bool: ...
     def open(self) -> None: ...
     def queue_bind(
         self,
-        queue,
-        exchange,
-        routing_key: Incomplete | None = ...,
-        arguments: Incomplete | None = ...,
-        callback: Incomplete | None = ...,
-    ): ...
+        queue: str,
+        exchange: str,
+        routing_key: str | None = ...,
+        arguments: _ArgumentMapping | None = ...,
+        callback: Callable[[Method[Queue.BindOk]], object] | None = ...,
+    ) -> None: ...
     def queue_declare(
         self,
-        queue,
+        queue: str,
         passive: bool = ...,
         durable: bool = ...,
         exclusive: bool = ...,
         auto_delete: bool = ...,
-        arguments: Incomplete | None = ...,
-        callback: Incomplete | None = ...,
-    ): ...
-    def queue_delete(self, queue, if_unused: bool = ..., if_empty: bool = ..., callback: Incomplete | None = ...): ...
-    def queue_purge(self, queue, callback: Incomplete | None = ...): ...
+        arguments: _ArgumentMapping | None = ...,
+        callback: Callable[[Method[Queue.DeclareOk]], object] | None = ...,
+    ) -> None: ...
+    def queue_delete(
+        self,
+        queue: str,
+        if_unused: bool = ...,
+        if_empty: bool = ...,
+        callback: Callable[[Method[Queue.DeleteOk]], object] | None = ...,
+    ) -> None: ...
+    def queue_purge(self, queue: str, callback: Callable[[Method[Queue.PurgeOk]], object] | None = ...) -> None: ...
     def queue_unbind(
         self,
-        queue,
-        exchange: Incomplete | None = ...,
-        routing_key: Incomplete | None = ...,
-        arguments: Incomplete | None = ...,
-        callback: Incomplete | None = ...,
+        queue: str,
+        exchange: str | None = ...,
+        routing_key: str | None = ...,
+        arguments: _ArgumentMapping | None = ...,
+        callback: Callable[[Method[Queue.UnbindOk]], object] | None = ...,
     ): ...
-    def tx_commit(self, callback: Incomplete | None = ...): ...
-    def tx_rollback(self, callback: Incomplete | None = ...): ...
-    def tx_select(self, callback: Incomplete | None = ...): ...
+    def tx_commit(self, callback: Callable[[Method[Tx.CommitOk]], object] | None = ...) -> None: ...
+    def tx_rollback(self, callback: Callable[[Method[Tx.RollbackOk]], object] | None = ...) -> None: ...
+    def tx_select(self, callback: Callable[[Method[Tx.SelectOk]], object] | None = ...) -> None: ...
 
 class ContentFrameAssembler:
     def __init__(self) -> None: ...
-    def process(self, frame_value): ...
+    def process(self, frame_value: Method[Any] | Header | Body) -> tuple[Incomplete, Incomplete, bytes] | None: ...
diff --git a/stubs/pika/pika/spec.pyi b/stubs/pika/pika/spec.pyi
index 7192aaab7..d0b6bf122 100644
--- a/stubs/pika/pika/spec.pyi
+++ b/stubs/pika/pika/spec.pyi
@@ -455,10 +455,10 @@ class Queue(Class):
 
     class DeclareOk(Method):
         INDEX: ClassVar[int]
-        queue: str
+        queue: _str
         message_count: int
         consumer_count: int
-        def __init__(self, queue: str, message_count: int, consumer_count: int) -> None: ...
+        def __init__(self, queue: _str, message_count: int, consumer_count: int) -> None: ...
         @property
         def synchronous(self) -> Literal[False]: ...
         def decode(self: Self, encoded: bytes, offset: int = ...) -> Self: ...