MAGNETIC CARD HOLDER - This package comes with 25 pre-cut flexible C-channel magnets and 35 perforated data cards. Each card slides nicely into the magnetic channel. Print or write on the cards to label file cabinets or metal shelves. HEAVY-DUTY MAGNETS FOR INDUSTRIAL USE - Suitable for a variety of industrial settings, these magnets can withstand continuous exposure to temperatures ranging from -15 to 160 degrees Fahrenheit. Mount to warehouse shelving or freezer doors. MORE EFFECTIVE THAN SELF-ADHESIVE LABELS - Compared to self-adhesive labels, these magnetic data card holders will save you time and money. Plus, you won’t need to worry about sticky tape residue. Each magnet can be easily removed and repositioned. FOR COMMERCIAL USE - These magnets can hold printed or handwritten inventory labels and data cards containing important product information such as names, SKU numbers, barcodes, prices, descriptions, and more. Use them for point of purchase displays. PRODUCT DIMENSIONS - Each flexible C-channel magnet is 0.125” thick, 2” high, and 3” long. The cards are 0.031” thick and 1.7” high, allowing up to 8 lines of data to be shown. Extra data cards can be purchased separately if you need more.