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 Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!