The 3M™ Projection Screen Whiteboard Film PWF-500MG is a high quality non adhesive film with whiteboard and projection screen capabilities. It has a thin magnetic backing making it easy to carry anywhere and simple to affix to any steel partition wall surface. It can be used as a projector screen by affixing it to blackboards, steel partitions, or any magnetic surface in offices or schools. Easy to install, ease to remove, easy to take away. Extremely portable.