Rotary caps for French horn ・Unused, but may have some scratches due to long-term storage. ・Set of 4 ※Inner diameter (threaded side): 24.5mm x 3, 20mm x 1 ※Material: Brass (nickel-plated) ※Compatibility with specific instruments is unknown. If the caps do not fit your instrument after winning the auction, returns are accepted. ※In case of a return, please note that you will be responsible for both the shipping and return shipping costs. Thank you for your understanding.