Aquatic Technology 6505WS1012E 10"x12" Red Emergency Spa Shutoff Sign is printed on .040 mil Styrene Plastic and is designed to label the emergency spa shutoff. Our general information signs are very noticeable and used to inform people of facility restrictions, policy, object location or instruction. This sign is lightweight, durable, and waterproof for indoor or outdoor use. Most state codes require emergency cut-off switches for their pool equipment.