Mutual Industries Sewer Line green underground marking tape measuring 3 x 1000 is designed for underground use and is made from 4 mil polyethylene. Mutual Industries Sewer Line green underground marking tape has a tensile strength of 5000 PSI and the message is repeated every 16 - 36 . Tape measuring 3 x 1000 features a pliable handprint and resists chemicals in the soil. • Marking tape. • 3 x 1000 . • Material: Polyethylene. • Legend: Sewer Line . • Thickness: 4.5 mil. • Tensile strength: 5000 PSI Elongation: 450 - 500%(min.) Flexibility: Pliable hand print. • Inks: Heat set arcar Message repeat: Every 16 - 36 . • Specifically designed for underground use. • Tape resists chemicals in soil for longer life. • Sold as 1 Roll.