For use in hospital and hotel bathrooms. 1″ (25mm) outside diameter. Clearance between towel bar and wall shall be 1 ½“ (38mm). Bar is 18-gauge (1.2mm), Type 304 stainless steel, satin finish. Mounting with snap flange to conceal mounting screws. Withstands 900 lbs (408-kg) downward pull when properly installed.