Under ground detectable warning tape 1.Material:OPP/AL/PE 2.High tensile strength& bright ... color 3.SGS report Under ground detectable warning tape 1) Made from thin sheets of bi-oriented polypropylene (PE ... .5mil(100micron-150micron)Common Width: 2",3",4",6" (50mm,75mm,100mm,150mm)Common Length:200m,300m,400m,500m,1000' 5 ...