flap disc/abrasive disc Size:100mm,115mm,125mm,150mm,180mm Material:Aluminium oxide Grit:36#-120# The abrasive flap disc with plastic, fiber-glass and steel, and bonded with the abrasive cloth closely, more flex and strong and consistant finish. They are fitted on portable electric angle grinders.If you are interested in it, please inquire us for more information. Flap Disc