These dry erase magnetic strip rolls are 1/2" x 10' & are 20 mil in thickness. They feature a dry erase (write on / wipe off) front and black magnetic back. The 1/2" rolls are available in White. This product is perfect for labeling shelves in your warehouse or filing cabinets in your offer. The product will stick to any magnetically receptive surface. We sell only 100% American Made products at Magnet Valley so you know you are receiving a high quality product!