This product includes two parts: a rear lens cap and a body cap. The body cap is used when storing the camera body or after the lens has been removed. It helps keep dust out of your camera mechanism. The rear lens cap is used when storing your lens or after the lens has been removed from your camera. It helps keep dust out of your lens mechanism. This set of body cap and rear lens cap is made of high-quality plastic material. Suitable for NIK0N AI lenses and F-mount system cameras, including third-party F-mount lenses (Tamron/Sigma, etc.). (Note: It is not suitable for NIK0N1 system cameras. According to a few customers' tests, it may not fit older F-mount lenses perfectly.) Package Contents (Optional): 1 X Rear Lens Cap or 1 X Body Cap Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 0-3cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!