Detectable Underground Tape, 6 In Roll Width, 1000 Ft Roll Length, Caution Buried Fiber Optic Line Below Legend, Solid Aluminum Foil Core, Orange, Thickness: 5mil, Elongation: 80 Pct Astm D882-75b, Composition: Ideal Specs: Bottom Layer Pe, Top Layer Pet, Foil Industry Standard, Tensile Strength: 35 Lb/in (15000 Psi)astm D882, For Protection, Location And Identification Of Underground Utility Installations