Specification:Color: gold Material:Piston Valve Kit:copper,metal,plastic Button Connecting Rod Set: all bronze Size:Piston Valve Kit:47.8 x 10 x 8.4 mm/1.88 x 0.39 x 0.33 inch(L x W x H) Button: 17 mm/0.67 inch(D) Weight:121gFeatures:1.Piston Valve Kit of Size: Water valve key: Large: length 47.8mm, width 10mm, height 8.4mm Small: length 26.7mm, width 9.9mm, height 9.4mm. Cork pad: diameter 8.9mm, thickness 3mm. Spring: 46mm, diameter 8.8mm .Valve spring: length 16.8mm, height 15.5mm, width 8.4mm. Spring holder: length 18mm, width 11mm, inner diameter: 4.5mm. Hand hook: length 80mm, height 25mm. Hand hook screw: length 8mm, diameter 9.9mm. Tuning tube screw: length 24mm, diameter 7.9mm. Small screw: length 13mm.2.Scope of application of drain valve set: suitable for three-tone B flat trumpet / cornet / palm trumpet in B flat trumpet, piston spring bracket trumpet.3.Button:Scope of application: It is suitable for the replacement of small piston snaps.4.Button:Convenience: exquisite craftsmanship, simple operation and installation, easy to use.5.Button:Aesthetics: Made of all-copper material and natural abalone inlaid buckle, it is , exquisite and beautiful.Package:1 x water valve key (one big and one small)2 x Cork pads 2 x valve springs3 x piston springs3 x spring rests+1 x hand hook and hand hook screw1 x Tuning Tube Screw2 x small screws1 x Button Connecting Rod Set