This standard sets forth a visual hazard alert system that can be easily recognized by people of any culture. It quickly communicates information about environmental hazards, so that injuries caused by such hazards can be avoided. Signs conform to ANSI-Z535.2 standards, which are continually revised every 5 years. Available in Vinyl, Plastic and Aluminum. Size 10" x 14". V = VINYL PL = PLASTIC A = ALUMINUM