Smooth Stainless Steel, 18 Gauge Tubing, Satin Finish, 1-½ Inch Diameter; Exclusive, Twist-Lock Concealed Flange Snaps into Place for a Secure, Tamper-Proof Mounting; Stainless Steel Mounting Flange is Heliarc Welded to the Tube to form a Single, High Strength Structural Unit that Cannot be Separated; All Bars have a Nominal Offset Distance of 1-1/2 Inch; Flat Contact Surface wont Cut or Mar Wall Surfaces Bar Remains Stable without Further Tightening; 304 Stainless Steel Mounting Flange, 14 Gauge; Tested to withstand 500 Lbs. of Downward Load when Properly Installed; Made in USA 1-1/2" x 36", Satin, 18 Gauge Stainless Steel, Straight, Grab Bar