Make shelving units, racks, magnetic boards, filing cabinets and more easier to identify with the Slap N Go Magnetic Holders. The clear poly pockets have a colored backing that allows the label to stand-out applied to a magnetic surface. Sticks to any clean, flat metal surface. Magnetic pockets are easy to apply, reposition or remove. For vertical or horizontal display. Poly pocket can fit inserts up to 4.25" x 2.5" in size. Hand write or use a label maker to customize included cardstock inserts. Each pack includes ten pockets and ten blank inserts.