Stainless Header Mfg., Inc. offers the finest in CNC laser cut header flanges. While most header flanges are made from 1/4" or 5/16" material, our flanges are precision CNC laser cut header flanges are cut from from 3/8" material. We offer our flanges in 304 stainless steel or 1018 cold rolled steel. The heavier material we use to fabricate our flanges greatly reduce the warping problems seen in other lighter flanges. These header flanges are U.S. made.