Internal serrations allowing for a positive hold onto cable and pipe bundles. The design of the head guarantees a high tensile strength while allowing a very low insertion force. Extra Heavy Cable Ties White in UK are flame-retardant, heat-resistant, UV resistant Cable Ties. They are also suitable for using in Computer Cables, network cables, home use, workshop and garden. Kafton UK Cable Ties offers the best Extra Long Cable Ties in UK.