... Perforation, painting, cutting. MS ERW black rectangular steel tube/pipe. As the profeesional steel pipes and pipe fittings manufacture in China ... ,we cansupply straight seam steel pipe,spiral steel pipe,seamless steel pipe,elbow, bend,end cap,flange ... EN10216,EN10219, ETC.Surface treatment: galvanized, oil, painted black as customer’s requirement.Packing: bundles, seaworthy wooden case ...