On Blow Combo Pack of Nylon Cable Zip Ties (4 Inch 100 Pieces and 6 Inch 100 Pieces Total 200 Pieces) Wire Organizers Self Locking Fasteners Wire Tie Wraps (Black). Made of industrial strength nylon 6/6 UL recognized material, and can be used in temperatures ranges from -10 C to + 85 C, weather resistant and outdoor in direct sunlight application is not an issue. Safe and environmentally friendly. These high tensile strength cable ties are flexible and non-breaking, safe and environmentally friendly. Self-locking fastener design has strong durable powerful lock with a smooth finish on one side and grooved finish on the other side. Ideal for bundling various items together at home, office, garden, workshop etc., and helping to sort out cords, electrical cables, wires. These cables are easy to use put the tail of zip tie through the ratchet hole in the head part, tighten it and cut the excess part with scissors or cable tie gun.