Silver Tone Aluminum CS Mount Lens to C Mount Camera Adapter Ring Product Name : C Mount Adapter Ring;Fit for : C Mount to CS Mount Lens Material : Aluminum;Size(Approx) : 31 x 9mm / 1.2" x 0.35" (Max.D*H) Color : Silver Tone Weight : 5g Package Content : 1 x C Mount Adapter Ring(Non-oem)