HERCULES STAND (Hercule Stand) HA100 Mute Holder Features: This is a mute holder for wind instruments that you didn't know you needed. It's a clamp type that can be attached to a music stand, etc. It's a holder attachment that supports wind instrument mutes. The diameter sizes of the holder rings are 80mm x 2 and 60mm x 1, and the rings are protected with rubber. Specifications: ■ Wind instrument mute holder ■ Size when folded: 100 x 250mm ■ Allowable weight: Approximately 5kg Please understand that this is stored at home.