MOS Reference: OSHA and ANSI Z535 compliant workplace safety signs communicating hazard warnings and PPE requirements to workers and visitors. Durable rigid plastic construction with fade-resistant UV-stable inks maintains legibility in indoor and outdoor environments. Pre-drilled mounting holes for easy installation on walls, posts, and fences. Available in Caution (yellow), Danger (red), and Notice (blue) header formats with clear pictograms and bilingual text. Proper safety signage is a fundamental OSHA requirement for hazard communication in all workplaces.