grinding head of felts polish the surface of jewellery, precise instrument, glass instruments, special mechanical parts abrasi 1,grinding head of felts,Polishing the surface of jewellery, precise instrument, glass instruments, special mechanical parts,etc.2,features, abrasion-resistant, heat-resistant, anti-pull, shrink-resistant.3,Specifications, height 10--70mm density 0.44--0.60mm diameter 10 ...