Bulletproof double kick pad.
The Remo Falam Slam Bass Drum Patch is crafted from Kevlar (the same material used in bulletproof vests) that protects your double bass drumhead from the abuse suffered from using plastic or wood beaters. They take a lickin' and keep on kickin'! 2-1/2" diameter.
2-1/2" Double Kick Drum Slam Pad