... : ABEC-7, P4 3.Long working life 4.High speed Dental handpiece bearingBearing feature:1.Material: AISI 440C, 9Cr18 stainless steel, Balls ... AIR, MIDWEST,STAR,FARO,ADEC,SIEMENS,LARES,etc. High speed dental handpiece bearing Structured DBD1C1 Shield Main Application I.D.O.D ... 0 263 2 4114 2 8143.5 0 8144 2 Dental handpiece bearing