Features: 1.Elastic good rebound quickly used to conduct drum vibration to the piezoelectric plate, so that the piezoelectric plate normal force 2.Made of high-quality.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information. 3.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed. Specifications: Material:sponge Color:Black&White Size: 28 x 20mm/1.10 x 0.79inch(L x Dia) Weight:9g Package Include: .
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