1)size: 1/2" to 48"(smls fittings) 26" to 72"(seamed fittings) 2)wall thick: Sch5--sch160, xxs 3)manufacturing standard: ANSI, JIS,DIN, GB ANSI B16.9/16.28 MSS SP-75 4)material: carbon steel, alloy steel, stainless steel. ASTM A234 WPB/WPHY42/50/60/70 ETC 5)coating: anti-rust black painting, 3PE coating or galvanized. 6)packing: plywood pallets or cases. 7)QC system:IS09001:2000