Grab bar shall have wall thickness of 18-gauge and outside diameter of 1-½". Distance from inside of grab bar to finished wall shall be 1-½". Flanges shall be 1/8" thick stainless steel plate, 2" x 3-1/8" in diameter, and each shall have two screws holes. Flange covers shall be 11-gauge and shall snap over mounting flanges to conceal mounting screws. Grab bar shall have 90 degree return to flange. Ends of grab bar shall pass through flanges and be heliarc welded to form one structural unit.