Straight nose cone with universal e-type for slow speed motors, metal twist release ring, accepts disposable prophy angles, 3/32" lab burs Features: • 40,000 RPM • Autoclavable Material and Prevention of Slipperiness • Easy for Lubrication with Open Shield Bearings • Ergonomic Design Specifications: • Size: 3.4” x .8” • Net Weight: 2.45oz.