CPA Tone Foam Overtone Control (4 pack)
Tone Foam is an easy way to get more control of your unwanted overtones. Tone Foam can be used on the top and bottom heads of your drums or on your cymbals.
They are designed to be a one-time use item, but we have had luck carefully removing them and re-using them again.
3/16" thick foam, 1.25" in dia.