Description: Complete 16 PCS in 1 set of alto sax repair parts High quality and 100% brand new Durable, can be applied for a long time Suitable for alto sax, saxophone replacement Great gift for saxophone players and DIY enthusiasts Size Chart: Spring Length: Approx. 5.1-5.5mm/0.20-0.22inch Bumper Felts Diameter: Approx. 7mm/0.28inch Steel Disc Length: Approx. 30mm/1.18inch Screws Length: Approx. 10mm/0.39inch Package Includes: 1 Set Saxophone Accessories(Bumper Felts Random Color) Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement, there may be 1-2mm error in size