1) Type: Equal Tee, Reducing Tee 2) Wall Thickness: SCH 5S through SCH XXS 3) Standard: ASME B16.9, ASME B16.25-2007, MSS SP 43, DIN, ISO, JIS, BS etc. 4) Material: Carbon steel: ASTM A234 WPB, A234WPC; Low temperature steel: ASTM A402 WPL 3, WPL6 High performance steel: ASTM MSS SP75 WPHY 42/46/52/60/65/70 5) Size: 1/2" through 48" 6) Surface treatment: Transparent oil, rust-proof black oil or hot galvanized. 7) Special design available 8) All the production process are made according to ISO9001: 2000 strictly.