Heil Sound Windscreen for PR30 & PR40 Microphones Windscreen for PR30 & PR40 Microphones The Heil WSMPR40 is designed to snuggly fit the Heil PR30 and PR40 large-diaphragm microphones The Heil WSMPR40 is designed to snuggly fit the Heil PR30 and PR40 large-diaphragm microphones