We carry a large selection of underground warning tape. This tape is used in the construction and surveying industries to help mark sites to prevent damage to underground utilities by accidental digging or by workers. Our Presco brand underground warning tape comes in several legend options like caution buried electric, fiber optic, buried gas line, telephone, sewer. waterline, and more. The two different forms of underground warning tape are detectable and non-detectable and both types are available in either 4 Mil or 5 Mil thickness with an aluminum core for easy detecting underground. Colors include blue, green, orange, yellow, purple, and red.