Zing Safety Sign, "Notice, Please Knock Before Entering," clearly communicates critical safety information. Self-adhesive signs are made from a minimum of 70% post-industrial polystyrene, and are resistant to solvents, moisture, scuffing, tears and UV exposure. All Zing signs are made in the USA from recycled materials. Recycled materials support sustainability initiatives and LEED credits. Signs are sold 1/pack.
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