1.carbon steel, crv steel 2.mirror polished,chrome plated Namedouble ring wrench Materialcarbon steel,crv steelSurface treatmentmirror polished,satin finishedSpecification6*7-30*32Qualitycomform with ANSI standard,frop forged,heat treated,corrosion resistantMOQ30ctnsDelivery portNingBoDelivery time30days after received depositPayment termT/TSupply ability100ctns/month METRIC(mm)SAEL(mm)Q'TY/CTN( ...