The FSSTUD 2 Pcs Camera Microphone Windscreens are made of sponge material and come in a pack of two pieces. They are designed to fit most shotgun microphones with a length of 12 cm, width of 4 cm, and inner diameter of 2 cm. These microphone foam covers help to minimize noise and ambiance, providing a cleaner sound quality for recordings. The shotgun microphone windshield headsets are easy to install and remove, making them convenient for on-the-go use. Overall, these microphone sponges are a practical accessory for anyone looking to improve the audio quality of their recordings with a compatible microphone.