B-290 Bobrick Classic Series Framed MirrorOne-piece roll formed frame is 3/4" x 3/4" (19 x 19mm), type-304 stainless steel angle with satin finish. Special bevel design hugs mirror. Corners are heliarc welded, ground and polished smooth. No. 1 quality, 1/4" (6mm) glass mirror electrolytically copper-plated; guaranteed against silver spoilage for 15 years. Mirror edges protected with plastic filler strips to prevent chipping; back is protected by 3/16" (5mm) thick, water-resistant, polyethylene padding. Galvanized steel back attached to frame with concealed screws. Secured to concealed wall hanger with two theft-resistant locking screws.