Glass board with Frosted back painting The Luxor WGB4834M Magnetic Glass Board is made of tempered 5/32 (4mm) thick glass. The magnetic surface allows for the hanging of documents, notes or magnetic markers. The super clear glass with bright white back painting is the ideal surface for wet/dry erase markers. The magnetic glass board will not stain or ghost. New and improved mounting system The WGB4834M glassboard comes with stainless steel mounting pucks with new and improved mounting system. This magnetic glass board measures 48 wide and 34 high and has a lifetime warranty.