Special design: Self-locking with push mount design, Easy to use,the gears are clear, good insulation and durability?. Application: Widely used in household, construction, electronic, auto, cable and wire assembly,Can be used to bundle and sort various cables and wires, such as the fixing of wires of lighting, oil pipelines of mechanical equipment, etc?. Package includes:30 Pcs x Black Cable Strap/Cable Ties;Can keep tough in a temperature range from -40? to 266 . Dimension: Size: 210mm*5mm/ 8.3" * 0.2"(L*W); Head Diameter: 8mm/ 0.31"; Fits into 1/4" holes?. Durable Material: Made of nylon plastic with flame resistance,safe, environmentally,Anti-aging, not easy to break?.