A4 magnetic cards, magnetic waterproof cards, material card, magnetic rack cards --13,770,623,753 / 02585561575 / 0258336472 1 / 13382761736 / 13382002183 widely used in institutions, military units, enterprises and institutions of the warehouse management. It is the back of the unique magnetic materials, can be directly adsorbed on the shelf, there is money waterproof. The product is certified by the parties, the effect is good, quality assurance. Please call for more information