OptiDisc General Assorted Kit 9.6mm, 12.6mm A combination of different grit size discs for contouring, finishing and high gloss polishing for composite, glass ionomers, amalgams, semi-precious and precious metals. Translucent for enhanced working surface visibility. Thin disc allows greater disc flexibility. Made of durable polyester impregnated with aluminium oxide particles. Flush-mounted mandrel and patented retention system to ensure precise operation, protecting neighbouring teeth from damage. Uncoated cutting edges for high efficiency from the start. Colour coded for easy recognition of grit size and clinical step. Contour: extra-coarse 80µm, Finish: coarse/medium 40µm. Polish: fine 20µm, High gloss polish: extra-fine 10µm. Contains: 30 each Extra-Coarse, Coarse, Fine & Extra-fine sizes 9.6mm and 12.6mm, 3 standard mandrels, 2 short mandrels, 1 OptiShine.