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MR74 ZZ QTY: 4pcs Dimension: ID= 4 , OD= 7 , W= 2.5 Chrome Steel,Metal Shields, Oiled , ABEC-3(ISO P6) Marking: Neutral Package: Vacuum plastic bags and envelopeWE ARE MANUFACTURER,WE ACCEPT PRODUCTION ORDERS. We accept combinate shipping. The parcel will be arranged within 2working days after receive the full payment. If you need Express shipping,please contact in advance. \'