B-401 Confined space sign 25921 when you get right down to it, total facility identification simply means communication, crisp, concise, comprehensive. Common uses include safety signs, utility signs, information signs, and equipment warning signs. Material Construction is High impact polystyrene, Standard Background Colors are Yellow, blue, green, red, orange, and white (conforms to OSHA recommendations), Standard Legend Colors are Black, white, red, blue, green and magenta, CS-10 wheels, 1000 g wts. and Legend withstands up to 700 cycles Abrasion Resistance (Method 5306 of U.S. Federal Test Method Std. No. 191A). Average outdoor durability is 3-5 years (Average expected outdoor life of product will depend on user definition of failure and climatic conditions). Legend "DANGER, PERMIT-REQUIRED CONFINED SPACE DO NOT ENTER", black/red on white color, 10" Height, 14" Width.