Features: 3.Perfect Suitable for daily maintenance and repair of B-flat trumpet,cornet and B-flat palm.4.This is a great upgrade alternative for your trumpet and made of high quality which is sturdy and to use.5.The felt washer is soft and smooth, it will not scratch the trumpet.6.Help to improve the accuracy of the keys and improve the fluency of playing.Specifications:Material:Copper,Metal,Plastic,Zinc AlloyColor:MulticolorBrand name: BQLZRSize:Spring:46x8.8MM/1.8x0.35(L x Dia)White Felt:15x5MM/0.59x0.19inch(OD x ID)Black Felt:18x9MM/0.7x0.35inch(OD x ID)Trumpet Valve Guide:18x11x4.5MM/0.7x0.4x0.17inch(L x W x Inner Dia)Trumpet Valve Cork Pad:3x8.9MM/0.11x0.35inch(H x Dia)Trumpet Tuning Slide O Ring:12x10MM/0.47x0.39inch(OD x ID)Finger Button: 1.6x1cm/0.62x0.4inch(DiaxT)Finger Button Thread Dia: approx 3.9mmWeight:22gPackage include:3 x Trumpets Finger Buttons3 x Spring 3 x White Felt 3 x Black Felt 3 x Trumpet Valve Guide 2 x Trumpet Valve Cork Pad 2 x Trumpet Tuning Slide O Ring