Contains 1 each: 1212, 1214, 1215, 1217. No matter what the material being worked, SUNBURST RADIAL DISCS are the "absolute best" for finishing, smoothing & high-lustre polishing of all precious, semi-precious and non-precious metals, acrylics and ceramics. The sharp, clean, specially treated ceramic abrasive grain imbedded throughout their thin flexible bristles enable them to work faster and last longer than traditional rubber polishers. SUNBURST RADIAL DISCS generate minimal dust and heat and eliminate the need for polishing compound. Color-Code: Yellow - Coarse, Red - Medium, Blue - Fine, Green - Ultra-Fine.