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 4-1/4 inch length x 2-1/2 inch height in size. Hand write or use a label maker to customize included cardstock inserts. Each pack includes 10 pockets and 10 blank inserts. Black backing. Pack of 10.