Premium, clear tempered glass surface never stains or ghosts. White, frosted glass background ensures high contrast results regardless of your dry erase or glass markers color. Glass is the highest quality dry erase surface available perfect for heavy use in any office, home or commercial environment. Modern frameless design includes hidden mounting brackets that give the impression that the board is floating on the wall. Works well with all dry erase markers and liquid glass markers. Multiple boards can be hung side by side to create a nearly infinite writing surface. Mounts vertically or horizontally. Warranty: Manufacturers lifetime warranty