Prevent unauthorized access to confined spaces with the Aciform "Danger Confined Space - Enter By Permit Only" Ace-Shield Safety Sign. This danger sign delivers a highly visible message in OSHA-compliant black, red, and white colors, clearly indicating a hazard that could cause serious injury if not avoided. Featuring a thick two-ply construction and a non-glare surface, this high-performance plastic sign is built for durability and reliability in extreme conditions. The subsurface UV-printed image is sealed by a laminate poly sheet. The front is a heavy-duty protective shield that resists fading, chemicals, corrosion, abrasions, cracking, and other environmental stresses. With its rounded corners and 1/4-inch mounting holes, this compliance sign is easy to install on a variety of surfaces. This Aciform industrial sign complies with OSHA 29 CFR 1910. 145 and ANSI Z535 requirements. Choose from a wide range of Aciform OSHA signs to achieve standardized, durable, and cost-effective messaging throughout your entire workplace facility.