Cup Shape PU holder for bracelet with outer diameter size 68-76mm 76-84mm and 84-90mm for bangle 14-25mm, 16-22mm, 22-28mm, 28-34mm, 34-39mm.We also have the PU Cone is 50-65mm,Shank diameter: 6mm or 10mm, Shank length:40mm.For inner grinding and polishing of bangle or bracelet.Application: Set bangle or bracelet and fasten it by cable tie(not included)