T-70/#69 A&E Bonded Nylon HEAVY sewing thread. Available in 40 different colors & 5 cone sizes. (400 yds, Goldenrod) Applications: Automotive, Furniture, Luggage & Handbags, Medical & Orthopedic Devices, Safety & Flotation Devices, Sporting Goods, Covers/ Web Slings & Tiedowns, Specialty Industrial T-70 has a tensile strength of 14 lbs on a straight pull. When sewn into a seam you will get 300 + lbs on a side pull. When you add a back-tack or bar-tack the side pull strength will triple or more. Available in Many Colors Needle size 18 Made in America