... :Frankfurt 2.Grit:24#~800# SpecificationsGranite,Marble,Travertine Steel Abrasive Brush 1.Type:Frankfurt 2.Grit:24#~800# 3. ... #, 60#, 80#, 120#, 180#, 240#, 320#, 500#, 800# and steel filament;FilamentDupont Tynex A from USA, Hahl from Germany ... and Chinese local material etc.ApplicationAutomatic grinding machine, Hand grinding machine, Arc Slab machine. Frankfurt antigue steel brush