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 condition Package List: 5 x Trombone Rubber Feet