Silver mirror is framed in 1/2x 1/2x 1/2x 20 gauge type 304 stainless steel channel. Channel frame is one-piece, roll formed to encase mirror and backing and reveal tight mitered corners. Frame has a polished #4 satin finish. Mirror is installed on 2 wall brackets that and held securely using theft resistant screws. One-piece 20 gauge corrosion resistant backing of mirror is protected by full size shock-absorbing water-resistant filler. Filler is made of 1/8thick expanded polyethylene microcell foam sheet material that is abrasion and water resistant. 30W x 36W overall.