High-speed Dental Bearing for KaVo handpiece, of high precision level P4 (ABEC 7), to be specially usable for various models ofKaVo high-speed dental turbine handpieces Materials of Bearing Parts:· Outer ring and Inner ring: Refined Stainless Steel 9Cr18Mo (AISI440C) · Ball: Refined Stainless Steel or Super-hard Ceramic · Cage: Phenolic or TorlonProduct Specifications:· Bearing size: d3.175*D6.350*B2.779mm· Rotating speed 350,000-450,000 rpm, under air-pressure of 200-250Kpa · Working life for about six months under the normal operation · Less vibration, Less noise · Antirust, Corrosion resistant · High temperature resistant for disinfection · Conform to RoHS Directive standard · To pack carefully into plastic-tube, or sealed plastic-film, then pack into paper box · Could pack well according to customer's requirements* For details, please kindly contact us. Thanks for your kind care!