Frame - fabricated of 18-8 type 304 stainless steel with exposed surfaces having a #4 satin-finish. One piece roll formed angle frame. All welded construction. Corners are welded and ground smooth. Back Panel - fabricated of galvanized steel with tab lock and snap lock design slots formed to receive wall hanger tabs. Shock absorbing material is placed between mirror and back panel. Standard Mirror Glass - #1 quality, 1/4" (6mm) plate/float glass guaranteed against silver spoilage for 15 years. Meets and exceeds federal specifications DD-M-00411B & C. S. 27.