Rings are covered with Specially Formulated Rubber Foam.
HA100 has 270° of ring swivel. 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 inch - 1.18 inch).

Weight: 0.5 kg (11 lbs.)
Load Capacity: 5 kg (11 lbs.)
Folded Size: 250 mm x 110 mm x 85 mm (9.8 inch x 4.3 inch x 3.3 inch)
Ring Diameters:
74 mm (2.92 inch) x 1
63 mm (2.48 inch) x 2
47.5 mm (1.87 inch) x 1