Avoid the problem of costly dig-ins to locate buried, non-metallic cables and pipelines with our Detectable Underground Tape. Providing you with double protection, this tape is easily located with an industrial grade non-ferrous metal detector before you dig, while its highly visible colors make it easy to locate after the dig has begun. Printed with a black legend on standard APWA colors, our Aluminum Foil tape is double laminated for extra protection. Conforms to the following specifications: · NTSB-PSS-73-1 · GSA Public Buildings Service Guide · American Gas Association 72-D-56 · API RP 1109 · OSHA 1926.956 (c) (1) · APWA Uniform Color Code · DOT Office of Pipeline Safety USAS B31.8 · Federal Gas Safety Regulations S 192-321 (e)