API tube fittings Sizes (O.D. x T): from 6 x 1mm to 168 x 30mm API tube fittings Detailed Product Description20Cr, 40Cr, 20CrMo, 35CrMo, 38CrMoAl, 50CrV, 30CrMoSiInner packing: Caps on two ends of every pipeOuter packing: Hexagonal shape bundles wrapped with strong steel trip or according to customers' requests