: Inner diameters: 2.1cm / 0.82in : 2.Protect your own privacy as well. Provides physical isolation to possible from the camera : 3.Suitable for all brands of cameras with similar size. simple installation, protect your privacy so easily : 1.Protection for your laptop webcam, camera attached on the monitor, say goodbye to the Package include: 1x Webcam (other accessories in the picture is not included