These Magnatag® magnets are 40 mil (.04 inch) thick, with a solid 10 mil (.01 inch) hard flexible plastic non-glare, non-smear ** damp-erase matte or dry-erase gloss writing surface laminated to strong 30 mil (.03 inch) permanently magnetized flexible soft magnetic rubber. They lock tight magnetically on the whiteboard steel surface to prevent accidental sliding dislodgment or movement, yet can be easily lifted for repositioning with the hard, firm EasyGrip™ edges.
Designed to give you a lifetime of daily use with minimum care. Magnatags® - Best Magnet - Best Value! *Note: Magnatag® whiteboard magnets are not painted ribbon-type magnet or covered with paper-thin, bubble-prone soft plastic film as offered by imitators. Magnatags® will not crack, split, peel, wear out, delaminate, bubble, fracture or crumble. They retain their full magnetic strength permanently.