The NMC RPT174 accident prevention tag is yellow and made of 15 mil vinyl for water and chemical resistance, has a black "Caution" logo on both sides for high visibility, and the front reads, "Do Not Operate," with two blank lined areas at the bottom labeled "Signed By" and "Date." This tag has a tensile strength of 6,300 pounds per square inch to help resist unauthorized removal. It includes a 3/8" diameter hole and an 8" one-piece nylon cable tie for attachment. The back of the tag reads, "Do Not Remove This Tag" followed by a blank area for customization, then "See Other Side." This tag provides a way to attach a customized warning to help improve safety when required. The tag measures 6 x 3 inches (H x W). (H is height, the vertical distance from lowest to highest point; W is width, the horizontal distance from left to right.)

Safety tags use color and text to help reduce workplace accidents by providing safety information at specific locations. They can be used to help prevent machine operation or power activation during maintenance and repair, identify the schedule and authority responsible for a project requiring extra caution, provide inspection status, and safety instructions. Sometimes a tag's thickness will be measured in mils. One mil equals one thousandth of an inch.

National Marker Company manufactures signs and safety information products. The company, founded in 1934, is headquartered in North Smithfield, RI.