This is a windscreen for SHURE MX412/MX418 microphones. It prevents noise and popping sounds caused by wind and other factors during outdoor recording. ■ Windscreen ■ Compatible models: MX412/MX418 I purchased this previously, but no longer need it, so I am selling it. This item is not often sold individually. I am also selling two other of the same item. Please contact me if you are interested in purchasing multiple items.