... manufacturer 3.Export to JP 4.ISO9001:2008 Steel machined welding box we are just a factory in Wuxi, China, maufacturing ... . Quality control 1.We have self-governed inspection Dept. 2.All our QC have more than 5 years detection experience 3 ... .Angle clearance:R0.03mm Item Steel machined welding box Material Steel ,Stainless steel, Iron ,Aluminum, Brass and etcMaterial standard DIN ,ASTM, JIS, BS ...