Features: 3.Exquisite workmanship, it can completely replace old or broken trumpet instrument parts. 4.Simple operation and installation, easy to use. 5.Trumpet button & connector rod are suitable for small snap replacement, the piston valve repair kit for three-tone B flat trumpet, piston valve repair kit for three-tone B flat trumpet, cornet, B flat hand horn. 6.The trumpet instrument snap button is made of full copper material and natural abalone inlaid button, which is and exquisite. 7.Trumpet instrument springs contract with tension. Stronger and more . Precise positioning and ensure coaxiality, good feel. Specifications: Material: Copper & Metal & Plastic Color: Multicolor Brand name: BQLZR Size: Button Diameter: 17mm/0.67inch Connecting Rod Overall length: 26mm/1.02inch Button Screw Diameter: 2mm/0.08inch Spring: 40x10mm/1.57x0.39inch (LxD) Cork Pad: 9x3mm/0.35x0.12inch (DxT) Black Felt: 18x9mm/0.71x0.35inch (ODXID) White Felt: 15x5mm/0.59x0.2inch (DxID) Rubber Ring: 12x10mm/0.47x0.39inch (ODxID) Spring Rest: 18x11.2x4.4mm/0.71x0.44x0.17inch (LxWxID) Weight: 86g Package include: 3 x Spring 6 x White Felt 6 x Black Felt 4 x Cork Pad 2 x Rubber Ring 3 x Abalone Snap 3 x Connecting Rod 3 x Top Cover 3 x Lower Cover