M42 T mount to 30mm to 23.2mm Microscope Adapter Camera Eyepiece Tube w/ C-mount Thread

Product Feature:

The Top male thread is M42*0.75 
The outer diameter of the tube is 30mm
the inner diameter is 23.2mm to accept biological Microscope tube
and the end female thread to accpet C-mount.
so it is Multi-function and powerful adapter both for Stereo microscope and biological microscope.
more detail to check our picture.

full metal-----Aluminum alloy