1.Deep groove ball bearing 6303-2rs 2.material:GCr15,Chrome steel 3.wide application 4.with low noise,suitable for high speed 1.Material: GCr15,9Cr182.Quality standard: ISO9001:20003.Precision standard: ABEC-14.Shield type: Open, Z, ZZ, RS, 2RS5.Feature: Low noise,good quality,suitable for high speed6.Application: micro-motor, household appliance, automobile, telecommunication facilities, medical ...