Microscope c-mount adapters and microscope SLR camera adapters are specific to the brand and model of microscope you have. If you are unsure which microscope c-mount adapter you need, please contact Microscope World.
Swift Microscope World
The Swift brand of scopes
The Motic brand of scopes
6122 Innovation Way, Carlsbad, CA 92009
(800) 942-0528 (US TOLL FREE)