The Trombone Accessories are designed for easy installation and are compatible with most trombones. The set features a secure slip-on design that ensures a snug fit, providing excellent grip during use. The soft cushion valve helps reduce key noise, offering a smoother and more comfortable playing experience. Rubber feet provide stable support, prevent sliding, and protect the instrument from damage.Features:- Color: Black- Material: Rubber- Size: 1.10 x 1.10 x 0.40 cm / 0.43 x 0.43 x 0.16 in- Hole Diameter: 4 mm- Simple and straightforward installation- Compatible with most trombones for added versatility- Slip-on design ensures a secure fit with no slipping- Soft cushion valve reduces noise for improved playability- Easy to clean and maintain, helping keep your instrument in optimal conditionPackage List: 5 x Trombone Rubber Feet