Tool Aid Wire & Cable Tie Assortment - 750 Pc. Self locking, flexible, multipurpose ties (zip tie style) Made from high strength Nylon 6/6 Ideal for securing wires, harnesses, cables and components. UL approved. 750 piece assortment includes the most popular lengths in different colors. Includes: 400 - 4" 18 lbs. tensile strength (100 each black, white, yellow, and red ties) 300 - 8" 75 lbs. tensile strength (white ties) 50 - 11" 75 lbs. tensile strength (white ties)