Equip your business with a fool-proof shipping label solution with Label master's Worded Dangerous When Wet Labels. In addition to complying with directives set by the DOT, these also meet the design and durability standards of 49 CFR, ICAO and other international air regulations. You'll be worry-free as these Hazard Class 4 labels are printed with light-fast inks for fade resistance and adhesives are formulated for use in various climates and environments as well as strong holds on corrugated boxes. Once affixed, they won't fade or fall off. They also feature outstanding chemical and abrasion resistance. Blue and white, these PVC-free vinyl labels are sized at 100 x 100mm (4 x 4 in.) and sold in packs of 25.