Lightning Boards are ideal projection surfaces since there is minimal glare and no hot spots when used. Designed to use with chalk or markers, this multi-purpose surface also accepts crayons, pens, pencils, and permanent markers. Best-Rite’s Lightning Boards are constructed of smooth, glass-hard, low gloss porcelain-on-steel. The gloss range of the durable dark gray surface is only between 10 degrees to 20 degrees to offer 80% less glare than standard porcelain boards. Laminated to ½" thick MDF and factory framed in anodized aluminum trim. Includes L-clips, rawl plugs and screws for installation. Includes a full-length tackable map rail made from recycled rubber and accessory tray with rubber Dura-Safe corners. Manufacturer''s 50-Year Guarantee!