HERCULES HA100 MUTE HOLDER HOLDS UP TO 4 MUTES Holds most cornet, trumpet, trombone and French horn mutes Specially Formulated Foam covering rings to eliminate noise 270 degrees of ring swivel to provide your ideal set up Designed to easily attach to most music and microphone stands with a shaft diameter of 8-30mm (0.31”-1.18”) Ring Diameters: 74mm (2.92”) x 1 63mm (2.48”) x 2 47.5mm (1.87”) x 1 Detachable accessory tray included Load capacity: 5 kg (11lbs) Folded size: 100x250mm (3.9x9.8”)