Features: 3.Suitable for three-tone B-flat trumpet/cornet/B-flat palm trumpet spring support plate.4.High-waist spring: contraction with tension. It has better strength and is more . Accurate positioning and guaranteed coaxiality, good feel.5.High-quality plastic material, not afraid of bending and extremely elastic. And it's and easy to carry, small enough to use out of your pocket.6.You can stick the clip where you need it. When taking notes, there's no need to search for your pencil, it's always close at hand. Quickly improve creative efficiency.7.It is easy and quick to install and can be installed anywhere where you often take notes according to your own needs. At the same time, it is also a good substitute for old and worn-out products.Specifications:Material: Plastic & Copper & Metal & PlasticColor: MulticolorBrand name: BQLZRSize:Trumpet Spit Valve Cork Pad: 9x3mm/0.35inchx0.12inch (DxThi)Trumpet Piston Valve Springs: 40x10mm/1.57inchx0.39inch (LxD)Trumpet Valve Withe Felt Gaskets:15x5mm/0.59inchx0.2inch (DxID)Trumpet Pencil Clips: 23x18x10mm/0.91inchx0.71inchx0.39inch (LxWxH)Trumpet Valve Black Felt Washers:18x9mm/0.71inchx0.35inch (ODxID)Trumpet Rubber Bumper inchOinch Rings:12x10mm/0.47inchx0.39inch (ODxID)Trumpet Valve Guides:18x11.2x4.4mm/0.71inchx0.44inchx0.17inch (LxWxID)Weight: 17 gPackage include:5 x Trumpet Pencil Clips3 x Trumpet Valve Guides4 x Trumpet Spit Valve Cork Pad3 x Trumpet Valve Springs2 x Trumpet Rubber Bumper inchOinch Rings6 x Trumpet Valve Withe Felt Gaskets6 x Trumpet Valve Black Felt Gaskets