... ISO 9001:2 Material is in line with national standards. Solar water heater parts are produced by skilled workers who have many years ... suppliers. At the same time ,our products has high quality and attractive designs. Styles:SpecificationΦ360,Φ400, Φ410, Φ420,Φ430 ... Φ480, Φ490,Φ500,Φ520(mm)(The main production is Φ360 and Φ460 ) Surface treatment polishingmaterials stainless steelthickness 0.35-0.50 ...