... low vibration,super low noise 3 rotating speed 350000-450000rpm Dental Handpiece Bearing of high precision level P4 (ABEC 7), ... usable for various brands of high-speed dental turbine handpieces Material of Bearing Part:Bearing PartMaterial CharacteristicsOuter ringRefined ... RoHS Directive standard Usable for many brands of High-speed dental turbine handpieces, such as KaVo, NSK, W&H, Bien ...