stainless steel straight tee size:1/8"-4" heat resistance corrosion resistance oil ... ., LR&SR, from 1/2 inch to 72 inch.2. Straight & Reducing TEE from 1/2 inch to 72 inch.3 ... , 5D etc.welding neck , slip on , socket weld , threaded, lap joint, blind, spectacle, orifice, ring and long welding neck flanges.SIZE ...