... …Cage MaterialSteel, Nylon, BrassPrecision RatingP6 P5 P4 P2 P0Seals TypeOpen, Z, ZZ, RS, 2RSQuality StandardISO9001:2000 StandardServiceOEM serviceDelivery time7-30 daysPayment ... professional supplier of deep groove ball bearing, has more than 15 years'experience in it.Main Market: Asia, Middle East, America ... skf or OEM high quality deep groove ball bearing 61912-Z