... serviceMy company produce high quality for flange ball valve importer with quick delivery. In strength of Quality ... yellow zinc (white) Namehigh quanlity for flange ball valve importerMaterialCarbon steel ,stainlesss steel ,brassSize1/4",3/8", ... ,20,32,40,50,65,80mmJoin typethread,flange,manifold,mountingCertificateISO9001:2000StandardAmeican ,Japan,Greman,Chinese,BritishSurface disposalBlank-phosphoric ...