... bearing,to be perfectly usable for high-speed dental turbine handpiece Dental bearing/dental bearing/Dental handpiece bearingProduct Specifications*Rings AISI 440C stainless ... balls or stainless steel balls*Rotating speed 350,000-450,000 rpm under air-pressure of 200-250Kpa*Working life ... usable for many brands of High-speed dental turbing handpiece, such as KAVO,NSK,W&H,BIEN AIR, MIDWEST,STAR,FARO,ADEC ...