Dental handpiece bearing 1.Material:stainless steel,ceramic 2.Precision: ABEC-7, P4 ... :1.Material: AISI 440C, 9Cr18 stainless steel, Balls: Si3N4 Ceramic balls or stainless steel balls.2.High speed 350,000-450,000 rpm ... ,STAR,FARO,ADEC,SIEMENS,LARES,etc. High speed dental handpiece bearing Structured DBD1C1 Shield Main Application I.D.O.D.Width ... 2 4114 2 8143.5 0 8144 2 Dental handpiece bearing