ITEM NAME:4Pcs Cylinder Lower Cover Caps Spare Parts for French Horn DIY Accessory Description: Made of copper material,durable and not easy to damage. Easy to install and use. They are great replacement for the old or broken ones. French horn cylinder cover are perfect fit for bass. Great gift for french horn players and DIY enthusiasts Specification: Outer Diameter: 32.5mm Inner Diameter: 3mm Thickness: 6.3mm Package Includes: 4 Pieces French Horn Bass Cylinder Bottom Cover Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.Thank you! SKU: ALU0037923578017155.Great gift for french horn players and DIY enthusiasts. French horn cylinder cover are perfect fit for bass. 4 Pieces French Horn Bass Cylinder Bottom Cover. Easy to install and use.