Features: 1.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; 2.Any question,please contact and send us the MPN label information. 3.Suitable for most trumpet finger button replacement and repairing. 4.Exquisite craftsmanhsip, convenient to use. 5.Made of zinc ally, with Blue Turquoise. Specifications: Material:Zinc alloy Color:Blue + Golden Size: 1.6 x 1cm/0.62 x 0.39 inch(Dia x T) Weight: 48g Package include: .