With good flexibility and simple structural design, this sponge cover can be installed and removed easily and quickly. Using windproof and sound-proof design, this sponge cover can more effectively filter out the external redundant vibration noise, wind noise, air conditioning noise and other miscellaneous signals to record pure sound. It is constructed of sponge material. There are 3 different length of the product for you to choose. It is suitable for personal recording studio, professional recording studio, stage, chat room, internet bar, broadcasting room and control room. Item Name: Sponge Cover Material: Sponge Style: A: Length: 12cm, B: Length: 15cm, C: Length: 21cm (Optional) Features: Windproof. Good Flexibility, Easy Installation Size Details: Style A: 12cm x 4cm/4.72" x 1.57" (Approx.) Style B: 15cm x 4cm/5.91" x 1.57" (Approx.) Style C: 21cm x 4cm/8.27" x 1.57" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Sponge Cover (Others Not Included)