Aluminium M 2" 1/2 X F 1" 1/2 reducer

Aluminium G 2" 1/2 threaded reducer, with external thread and internal hole and G 1" 1/2 thread.
Aluminium M 2" 1/2 X F 1" 1/2 reducer
Aluminium G 2" 1/2 threaded reducer, with external thread and internal hole and G 1" 1/2 thread.