... 2.Precision: ABEC-7, P4 3.Long working life 4.High speed Dental handpiece bearingBearing feature:1.Material: AISI 440C, 9Cr18 stainless steel ... ,BIEN AIR, MIDWEST,STAR,FARO,ADEC,SIEMENS,LARES,etc. High speed dental handpiece bearing Structured DBD1C1 Shield Main Application I.D.O.D ...