What does UN3481 mean? The UN3481 number signifies that the package has lithium-ion batteries either contained in or packed with equipment. If you want to ship lithium battery's you need this sticker!! This listing is for 1 set of 10 labels Why buy 500, when all you need is a few! Display's the Required warning 10 - Pressure Sensitive Labels Each Label measures 3 inches long by 4 inches wide Satisfaction Guaranteed