Dental 1:5 Fiber Optic Increasing Contra Angle Internal Water Spray High Speed with LED handpiece Features: Cellular Glass Optics NSK Ceramic Bearings(If Chinese bearing price is lower) Clean Head System Push Button Chuck Microfilter Gear Ratio 1:5 Increasing For FG burs (Ø1.6) Water Spray Quattro Spray Body Material Titanium Body Coating Staimless Steel Max Speed 200,000 min-1