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.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.Three-tone B flat trumpet. Cornet, B flat palm number piston spring bracket.4.Suitable for three-tone B flat trumpet, cornet, and B flat palm trumpet.5.Made of high-quality materials, good quality and durable.Specifications:Material:Repair kit:Copper+Metal+PlasticFinger Button:Zinc AlloyColor: MulticolorSize:Water valve key: Large: 4.78x1x0.84cm/1.88x0.39x0.33inch(LxWxH)Small: 2.67x0.99x0.94cm/1.05x0.39x0.37inch(LxWxH)Cork pad: 0.89x0.3cm/0.35x0.12inch(DxH)Spring: 4.6x0.88cm/1.81x0.35inch(DxH)Valve spring: 1.68x0.84x1.55cm/0.66x0.33x0.61inch(LxWxH)Reed support: 1.8x1.1x0.45cm/0.71x0.43x0.18inch(LxWxID)Hand hook: 8x2.5cm/3.15x0.98inch(LxH)Hand hook screw: 0.8x0.99cm/0.31x0.39inch(LxD)Tuning tube screw: 2.4x0.79cm/0.94x0.31inch(LxD)Small screw: 1.3cm/0.51inch longFinger Button Size: 1.65 x 1cm/0.65 x 0.39 inch(Dia x T)Weight:54gPackage include:1 x Large Trumpet Drain Valve Key 2 x Trumpet Spit Valve Cork Pad 3 x Trumpet Drain Valve Spring 3 x Trumpet Valve Springs 3 x Trumpet Valve Guide 1 x Trumpet Valve Slide 1 x Trumpet Valve Slide Screw 1 x Tuning Screw 2 x Screw