This Is A "C? to "CS" Mount Lens Black Aluminum Adapter for Most Types Of CCTV Security Camera A 5 Mm Adapter Ring Attaches Between Camera and Lens + Converts a "C? Mount Lens for Use on a "CS" Mount Camera If You Have CS Mount on Your Camera and You Have Lens with "C" Mount, Definitely You Need the Our Adapter to Put Between Your Camera and Lens Extension Tube 5mm. You can screw to the back of any C-mount lens.
Listing Includes: 6 x METAL CS MOUNT LENS TO C MOUNT BLACK RING ADAPTER