The effect is adjustable, just adjust The drum of the drum can be tight. Rubber drum ring:The rubber drum ring is tightly fitted to the drum surface, which can be adjusted by adjusting the tightness of the drum skin.
1x Bass Drum Port Hole Protector Pads Drum Rings Drum Accessories Anti Slip
Bass Drum Port Hole Protector Pads Bass Drum Accessories Protector Ring Soft
1Pcs Bass Drum Port Hole Protector
Bass Drum Port Hole Protector Pads Protector Ring Improve Sound Quality
1 Piece Bass Drum Port Hole Protector Pads Easy to Use sparepart Improve Sound
Aquarian Bass Drum Port Hole 5"
