Metal C mount Rear Lens Cover Cap for CCTV Material: Aluminum alloy Color - Quantity Black - 10 pcs /2 pcs / 1 pcs Silver - 10 pcs Suitable For: C-mount Lens This rear lens cap is used when storing your lens or after the lens has been removed from your camera. It helps to keep dust from your lens mechanism. This metal cap is perfect for any C Screw mount lens such as Asahi Pentax Super Takumar and any other C screw mount lens. Packing Included: 10 x Metal C-mount Rear Lens Cap / 2 x Metal C-mount Rear Lens Cap / 1 x Metal C-mount Rear Lens Cap Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.