6pcs/set dental composite resin polishing disc set spiral Flex Brush Burs describe: 1. Diamond impregnation 3-stage polishing system coarse/medium/fine (1. Smoothing. 2. Pre-polishing. 3. High-gloss polishing) 2. The best effect and high efficiency 3. Suitable for composite materials, ceramics and zircon 4. Recommended speed: 7,000-12,000 rpm/min pack: 6pcs/set We are a professional dental manufacturer and brand. If you need bulk purchase, you can contact us, we will Give you a preferential price. This product may be used by healthcare professionals For professional use only. The seller may ask you to prove that you are qualified Medical professionals The right to purchase and use such products in your country.