Designed for Audio Technica ATM650 (approx 28mm capsule housing), but will of course fit similar capsules.

The foam on my 10+ year old mic was all crumbly, so I cut some memory foam from [insert furniture] and needed a bracket to hold the foam in place so it didn't get all crumpled up while screwing in the mic's grill.

USE THIN FOAM or a mesh/sonically transparent fabric if you do this, otherwise your higher frequencies will be very muffled.