... bearing is miniature ball bearing,to be perfectly usable for high-speed dental turbine handpiece Dental bearing/dental bearing/Dental handpiece bearingProduct ... , Weak base resistant*Corrosion resistant, High-temperature resistant*Perfectly usable for many brands of High-speed dental turbing handpiece, such as KAVO ... ,ADEC,SIEMENS,LARES,etc.Dental bearing size:6.35(1/4") * 3.175(1/8") * 2.38(3/32")6. ...