Accuform MCSP122VS Adhesive Vinyl Safety Sign, Legend"DANGER CONFINED SPACE PERMIT REQUIRED DO NOT ENTER", 7" Length x 10" Width x 0.004" Thickness, Red/Black on White Square corners and scored backing for quick peel-off and application 4-mil thick printed matte surface with permanent acrylic adhesive Moisture-resistant Suitable for indoor or sheltered environments Complies with OSHA 29 CFR 1910.145 and ANSI Z535 requirements