Machinery, Cutting Machinery, Electronics Machinery, Grinding, type:T27(flat) T29(conical) fiber backings layers:5 18 metal ring: 1 or 2 or as requirement inner diameter:16MM, 22MM outer dismeter:75MM, 85MM, 95MM. 107MM. 117MM. 140MM. 170MM. 180MM. or as requirement applicationgs:used as the mesh cap for flap disc the excircle of backing disc is dealed with polishing without burr, the discrepanly of external diameter is less than 1mm, Can be, Cutting Wheels ...