Features:3.Exquisite craftsmanhsip, complete parts, simple and convenient. Perfect suitable for the daily repair of wind instrument.4.High quality materials to ensure long-term use, which help to improve the accuracy of the keys and improve the fluency of playing.5.Suitable for B-flat trumpet,cornet and B-flat palm replacement and repairing.6.The trumpet finger button thread diameter is 4mm(M4), please check the size before purchasing.7.Helps repair trumpets quickly and provides more accurate buttons.Specifications:Material: copper, Metal, PlasticColor: Multicolor name: BQLZRSize:Trumpets Finger Button: 16 x 10mm/0.65 x 0.39 inch(Dia x T)Trumpets Finger Button: 4mm (Thread Dia)S Trumpet Drain Valve Key: 26.7x9.9x9.4mm/1.05x0.38x0.39inch(L x W x H)L Trumpet Drain Valve Key: 47.8x10x8.4mm/1.88x 0.39x0.39inch(L x W x H)Trumpet Cork Pad: 3x8.9mm/0.11x0.35inch(H x Dia)Trumpet Drain Valve Spring: 16.8x8.4x15.5mm/0.66x0.33x0.61inch(L x W x H)Trumpet Valve Springs: 46x8.8mm/1.8x0.35inch(L x Dia)Trumpet Valve Guide: 18x11x4.5mm/0.7x0.4x0.17inch(L x W x Inner Dia)Trumpet Valve Slide: 80x25mm/3.14x0.98inch(L x H)Trumpet Valve Slide Screw: 8x9.9mm/0.31x0.39inch(L x Dia)Tuning Screw: 24x7.9mm/0.94x0.31inch(L x Dia)Scew: 13mm/0.51(L)Weight: 58gPackage include:3 x Trumpets Finger Button1 x Small Trumpet Drain Valve Key1 x Large Trumpet Drain Valve Key2 x Trumpet Spit Valve Cork Pad2 x Trumpet Valve Spring3 x Trumpet Drain Valve Spring3 x Trumpet Valve Guide1 x Trumpet Valve Slide1 x Trumpet Valve Slide Screw1 x Tuning Screw2 x Screw