Blasting Barricade Sign Stands - Stop Blasting In ProgressFlashing. Simple folding signs make your blasting safety procedures more efficient.Plastic 45"h x 25"w sign stands have a 36"h x 24"w reflective vinyl sign on one side. Write on signs with grease pencil then easily wipe off. Signs are coated to resist weather and fading. Barricade light is sold separately. Stand is available in orange.