Grab Bar 18-8 S, type-304, 18-gauge (1 mm) stainless steel tubing with satin-finish. 1-12" (25.4mm) outside diameter. Concealed Mounting Flanges 18-8 S, type-304, stainless steel plate; end flanges with two holes for attachment to wall. Snap Flange Covers 18-8 S, type-304, 22-gauge (0.8mm) drawn stainless steel with satin-finish. Each cover snaps over mounting flange to conceal mounting screws. Sizes: 450mm, 600mm, 750mm Width