ChromaLabel Big Protect From Heat Stickers (Sun, Box Red Lined) - International Symbol | 3" x 4" - 500 Semi Gloss Labels per Roll on 3" Core | Permanent Adhesive Great for Shipping, Warning, Moving Permanent adhesive is pressure sensitive and sticks great to plastic, cardboard, glass, wood etc Label boldly says PROTECT FROM HEAT and red marks our a box with the sun. It's IATA compliant. The material is semi glossy, paper label stock Stickers size is a large, eye catching 3x4 inches - works perfect for International Safe Handling 500 labels are finished on a 3" core and cleanly shrink wrapped