Underground detectable warning tape Widely used for underground pipe,electrical lines,sewer lines,gas ... visual results3) Designed for underground pipe protection4) Specification for each roll:Common Thicknesses: 4mil,4.5mil,5mil,5.5mil(100micron-150micron ... ’ (available in 300m,500m,1000m upon request)5) Packing:each roll/poly bag or color box,or as your requirements