DURABLE POLYESTER: 5 mil thick 'Confined Space' labels offer exceptional durability! Overlaminated with a clear UV and chemical-resistant polyester, these labels offer enhanced longevity. Square-cornered labels are more prone to peeling and detaching quickly, making our rounded design a superior choice for lasting performance. STICKS BETTER: Our labels use a heavy 2 mils thick aggressive adhesive. This allows our labels to be applied to plastics, metal, wood or onto textured, damp or even slightly dirty surfaces. A typical label from a competitor has a lightweight 0.8 mils thick adhesive. PACKAGING: Our labels are also packed in a stiff board flat pack. This ensures that you get your labels delivered wrinkle-free without any jumbling up. OSHA COMPLIANCE: Safeguard your workplace from accidents and liabilities by placing our high-quality signs that follow OSHA regulations. These are universally recognizable and encourage safe work practices. PACK CONTENTS: Pack of four 5 x7 inch red, black and white labels. SmartSign (Pack of 4) 5 x7 inch “Danger - Confined Space, Authorized Personnel Only” OSHA Sticker Labels, 5 mil Laminated Polyester with SuperStick Adhesive, Red, Black and White, Made in USA