Manufacturers description

A2WS Locking Microphone Windscreen
The Shure A2WS Windscreen is designed with acoustically transparent material to reduce unwanted breath and wind noise without affecting the sound quality. It is particularly effective in reducing pops and ticks caused by talking or singing closely into the microphone as well as reducing wind noise when using the microphones in outdoor applications. Locks securely to the microphone with a side set screw.
For use with Shure SM57 and 545 Series microphones.
A2WS-BLK - Black
A2WS-GRA - Gray
Description
SHURE WINDSCREENS
Foam and basket types to fit Shure microphones, and other manufacturers's models of similar shape and size.