Description: FG (Friction Grip) 1.6mm - For use in high speed handpieces and friction grip low speed contra angle heads Material: Aluminum Oxide Abrasive Color/Grit: White (Fine) Color/Grit: Green (Coarse) For (fine) finishing of enamel, composites, compomers, and porcelain Recommended Speed: 6,000-10,000 RPM MAX:12,000 RPM 135 Autoclavable Packaging: Box of 12 stones FDA Statement: The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. If so, do not bid on this item unless you are an authorized purchaser. If the item is subject to FDA regulation, I will verify your status as an authorized purchaser of this item before shipping of the item.