Feature Diamond Impregnated Rubber Discs. *Excellent for EMAX porcelain & ZIRCONIA polishing and margin adjustments. *BLACK SUPER coarse rubber disc a highly impregnated rubber disc forreduction on ZIRCONIA and all types of ceramic materials with great ease, this range of rubber wheels has exceptional long life properties with all ceramic materials. Description: *Super Coarse *ZIRCONIA polishers can replace EDENTA JOTA Color: Gray