Replacement Clarinet Adjustable Strap Ring Thumbrest Thumb Rest M3 Product Name : Clarinet Thumb Rest;Turning Style : 6R Thread Dia : M3;Thread Hole Center Distance : 10mm/0.4" Ring Hole Dia : 6mm/0.24";Total Size : 18 x 16 x 27mm/0.7" x 0.63" x 1.1"(L*W*T) Materials : Metal;Main Color : Silver Tone Net Weight : 11g;Package Content : 1 x Clarinet Thumb Rest