Features: - : Exquisite craftsmanship, complete parts, simple and convenient - Perfect for daily repair of wind instruments - High-quality materials ensure long-term use, helping to improve key accuracy and playing fluency - Suitable for B-flat trumpet, cornet, and B-flat palm replacement and repair - Trumpet finger button thread diameter is 4mm (M4); please check the size before purchasing - Helps repair trumpets quickly and provides more accurate buttons Specifications: - : Material: Copper, Metal, Plastic Color: Multicolor Name: BQLZR Size: Trumpet Finger Button: 16 x 10mm / 0 - 65 x 0 - 39 inch (Dia x T) Trumpet Finger Button Thread Diameter: 4mm Small Trumpet Drain Valve Key: 26 - 7 x 9 - 9 x 9 - 4mm / 1 - 05 x 0 - 38 x 0 - 39 inch (L x W x H) Large Trumpet Drain Valve Key: 47 - 8 x 10 x 8 - 4mm / 1 - 88 x 0 - 39 x 0 - 39 inch (L x W x H) Trumpet Cork Pad: 3 x 8 - 9mm / 0 - 11 x 0 - 35 inch (H x Dia) Trumpet Drain Valve Spring: 16 - 8 x 8 - 4 x 15 - 5mm / 0 - 66 x 0 - 33 x 0 - 61 inch (L x W x H) Trumpet Valve Spring: 46 x 8 - 8mm / 1 - 8 x 0 - 35 inch (L x Dia) Trumpet Valve Guide: 18 x 11 x 4 - 5mm / 0 - 7 x 0 - 4 x 0 - 17 inch (L x W x Inner Dia) Trumpet Valve Slide: 80 x 25mm / 3 - 14 x 0 - 98 inch (L x H) Trumpet Valve Slide Screw: 8 x 9 - 9mm / 0 - 31 x 0 - 39 inch (L x Dia) Tuning Screw: 24 x 7 - 9mm / 0 - 94 x 0 - 31 inch (L x Dia) Screw: 13mm / 0 - 51 inch (L) Weight: 58g Package Includes: 3 x Trumpet Finger Button 1 x Small Trumpet Drain Valve Key 1 x Large Trumpet Drain Valve Key 2 x Trumpet Spit Valve Cork Pad 2 x Trumpet Valve Spring 3 x Trumpet Drain Valve Spring 3 x Trumpet Valve Guide 1 x Trumpet Valve Slide 1 x Trumpet Valve Slide Screw 1 x Tuning Screw 2 x Screw