we provides the bright finish stainless steel welding wire, which is our star product and spring makers always praise our spring Grade: 200 series & 300 series & 400 seriesStandard: ASTM A580, AISI,GB/T 4240, JIS G4309, Diameter: 0.7-4.2 mm,,,Surface: brightPacking: MIG in spool DIN270 15kg TIG plastic box 5kg.......