Our mic foam covers are compatible with microphones that measure 3-6mm diameter. These include COS11s, DPA 4060, 4071, ME2/MKE2, RODE Lav, Tascam TM-10L, Countryman B3 & many more URSA microphone covers foam can be rigged onto aerial tips to help reduce RF loss Low profile mic foam mounts to reduce clothing noise The lavalier concealer foamies Measure 24mm length, 17mm width and 9mm tall with a 2.5mm diameter hole that stretches up to 6mm. (URSA Mini Foamies measure 22mm length, 14mm width and 7mm tall with a 1.5mm diameter hole that stretches up to 4mm) Our Mic Foam is Available in Packs of 12 in Black or White