... , 1.2 Max,line speed during operation:80m/s Sanding discs. Thickness of fibrebacking(mm)0.6, 0.8, ... 0, 1.2Max,line speed during operation:80m/sabrasive discs are produced on the production line imported from Italy. ... fibre,synethetic resin and abrasive as raw material.The discs are intended for use on electrical and pneumatic grinders ... (mm):dia 100 bore16tf,abrasive paper,fibre discs,abrasive tool