Safety Tags identify a temporary hazard until that hazard is eliminated or hazardous operation is complete. They comply in accordance with OSHA 29 CFR 1910. 145 and ANSI Z535 requirements. Tags are thin and flexible poly-based cardstock without wood content. They're longer-lasting, durable, tear-resistant, waterproof, and will not crack, distort, or shrink, when compared to traditional paper cardstock. Easy to write-on matte surface has 3/8" plain top, pull-resistant hole.