The Knox Gear Medium Pop Filter is perfect for use with recording podcasting and streaming microphones. It s a guard used by amateurs and professionals to achieve clearer audio recordings by eliminating popping sounds from P s and B s. It also keeps saliva from hitting the microphone. An Inexpensive Way to Improve Audio Quality Whether you re a professional or amateur adding a pop screen to your recording set up is a cheap and easy way to improve the audio quality of your recordings immediately. Pop screens diffuse wind and gusts of air expelled from your mouth when you speak to help eliminate the loud thuds that can occur when air hits the microphone. Eliminating these noises makes your recorded audio sound clearer and more professional to listeners! Designed for 40-60mm Microphones This medium pop screen is designed for use with 40 to 60 mm microphones. Make sure you know which size you need before deciding on a pop filter.