3PK Hercules Mute Holder for Mic Stand is designed for cornet, trumpet, trombone, or French horn mutes. **Features:** * Specially Formulated Foam covering rings to eliminate noise. * 270 degrees of ring swivel to provide your ideal set up. * Designed for cornet, trumpet, trombone, and French horn mutes. * Attaches to most music and microphone stands with a shaft diameter of 8 mm - 30 mm (0.31" - 1.18"). * Detachable accessory tray included. **Includes:** * 3x Mute Holders Please note: Mic stand and mutes not included.