Bass Drum Enhancer Port Insert Enhancement Hole Protector Amplifier Kick Booster With Protection Sticker1. Made of environmentally friendly ABS material, which is durable and not easy to deform.2. Bass drum design tuning port to expand your low-end frequency.3. The drum ring fits closely with the drum surface, which can be adjusted by adjusting the tightness of the drum skin.4. The bass reverberation speaker can enhance the propulsion of bass audio, concentrate and compress the air in the drum cavity to the inside, making the bass part more powerful. The effect is adjustable. Just adjust the drum tightness.5. The inner diameter of the drum shall be cut along the circle to avoid unnecessary damage. Material: ABScolour:Glitter Brown / smudge blackPackage Contents:1 x Bass Drum EnhancerOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.