B-5806X18 Bobrick Concealed Mounting with 18" Snap Flange Grab Bar - Satin Satin-finish 18-gauge type 304 stainless steel tubing 1-1/4" (32mm) diameters.Bar passes through flange and is heliarc welded to form single structural unit.Cover snaps over mounting flange to conceal screws.Concealed mounting flange 1/8" (3mm) thick stainless steel plate, 2" W x 3-1/8" H (50 x 80mm), with two screw holes for concealed anchors.Cover is 22-gauge (0.8mm) stainless steel with satin-finish, 3-1/4" (85mm) dia.Grab bars that provide 1-1/2" (38mm) clearance from the wall can support loads in excess of 900 pounds (408-kg) when properly installed.Meets ADA Accessibility Guidelines in U.S.A.All joints and supports are contour cut and welded.Concealed anchors and fasteners available as an optional accessory.Peened nonslip gripping surface available.