These Forgefix Cable Ties are suitable for a range of tasks in areas including: gardening, electrical installations, sign installation, point of sale applications and much, much more. They can be joined together, increasing the size and diameter reach. The cable tie consists of a tape section with triangular teeth that slope in one direction, as in a ratchet mechanism. The head of the cable tie has a slot with a flexible pawl that rides up the slope of these teeth when the tape is inserted. Once the pointed tip of the cable tie has been pulled through the case and past the ratchet, it is prevented from being pulled back; the resulting loop may only be pulled tighter. Extensive size range from 100-450mm. Available in widths 2.5-8.0mm. The ties have a temperature range for continuous use from 40-85C. These ForgeFix Cable Ties are: Colour: Black Size: 8.0 x 450mm Pack Quantity: 100