Heavy duty type 304 Stainless Steel 18 gauge tubing (.049) Flanges are 3" diameter 16 gauge (.065) Grab bars are 1-1/4" diameter 1-1/2" wall clearance to meet ADA and ANSI Codes SNAP on Concealed Flange Covers 24 gauge (.024) Meets ADA requirements when installed correctly. Mounting hardware included (#10 x 2" stainless steel wood screws), however we recommend togglers or WingIt mounting kits when wall studs are not locatable.Straight Grab Bar with snap on / twist-Lock concealed flange. Manufactured by GBS from 18 gauge, type 304 stainless steel, satin finished, tubing. 14 gauge stainless steel mounting flanges, heliarc welded to the tube to form a single structural unit. GBS Grab Bars are made standard with 1.5" wall clearance and are designed, built & tested to withstand 900lbs. (408kgs) of load when properly installed.•  This exceeds HUD, FHA, VA, ADA, ANSI and other federal, provincial, and local codes. • Grab Bars can only be as strong as what they are mounted to. It is imperative when installing any safety product to consult with a qualified contractor to ensure you have sufficient backing.