The Movo Ws-gs Series Windscreen is part of our professional line of windscreens and features a dual artificial fur outer layer, acoustic foam inner layer, and airtight rubber base for maximum 360A ° wind protection. How to measure First, ensure that your microphone capsule is between 18-23mm in dimeter. Then, determine the length you need by measuring from the front-end of the capsule to the end of the grille (vents), and add about 1cm to that measurement to ensure a full seal