Two-Step Diamond Composite Polishers - First Step Medium RA 2DiaF3, 4 x 10mm. 6/Pk. For use with nanocomposites, microcomposites, hybrid composites, compomers and ionomers. Available in two abrasive grits: Medium (Blue) for smoothing and Fine (Yellow) for final high gloss shine. Optimized diamond grit produces the perfect finish while reducing chair time with minimal instrument wear. Wet polishing is recommended. Recommended Speed: 7000 – 10,000 rpm, Sterilization: Autoclave.