Steel pipe connect flange 1.Schwing,Putzmeister,Sany,Kyokuto,etc ... collarsInner diameter: 2", 2 1/2", 3", 4", 5", 6"Outer diameter: 3.06", 3.45", 4.18", 5.18", 6 ... according to your drawing or samples.Payment of the steel pipe connect flange No.1 TT 30% deposit prepaid, ... at sightPackingNo.1 Wooden boxNo.2 Iron boxNo.3 Seaworthy packing, according to the customer demand. Steel pipe connect flange