... 6.0mm5)Polishing: 400 grit, 600 grit, 240 grit, HL, 2B, BA Details: StandardAISI, ASTM, GB Square pipe Side length20mm*20mm ... .304L.316.316L Polishing400 grit, 600 grit, 240 grit, HL, 2B ApplicationArchitecture,furnishing,liquid&gas transport,petroleum, smelting, food industry, power ...