Accuform Signs “DANGER DO NOT OPERATE” Accident Prevention Tag with do not remove tag warning on back measuring 5 78″ X 3 18″ is made of 15 mil rigid RP-Plastic material for added strength and enduringness. Tag can be used to alert staff to cautions by providing safety and it works in all enormous environments. It is ideal for indoor and outdoor environments. High-strength plastic tag being water-resistant can be used in all weather conditions. Flexible tag will not readily break down over a wide temperature range. Durable tag with an abrasion resistant writable surface tolerates stretching and ripping. Tag has a 38″ hole at the top reinforced with metal grommet to avoid pull off.