These round ball foam windscreens are good to use with our HM-26 Head mic supplied with the PPA-5. Windscreens need to be replaced on a regular basis for WH&S and each user should use their own windscreen. These round windscreens can also be used with various other head mics, such as those from AKG & Shure. They soften the "plosive" vocal sounds and keep the wind out of the microphone if used outdoors. Supplied in packs of 8.