1-1/2″ dia. Straight Stainless Steel Grab Bars. Constructed of 18-gauge, type 304 satin-finish stainless steel tubing with peened finish. Concealed mounting flange with screw holes for concealed anchors. Cover is 22-gauge, type 304 stainless steel with satin finish, 3 1⁄4″ (85mm) diameter. Cover snaps over mounting flange to conceal screws. Available in a number of different lengths.