... professional manufacturer and director unit of China Bearing Industry Association ,we product all kinds of bearing with high quality and competitive price ... Delivery time : 30 days usual Payment : T/T mainly, L/CMaterialbearing steel , carbon steel ; ... , C3, C4, C5 ; Tolerance: ABEC1, ABEC3, ABEC5 (P0, P6, P5) ; Deep Groove Ball bearing 61910