HiyaHiya interchangable cables are used in conjunction with a set of HiyaHiya Interchangable Tips to create your knitting needle. These cables fit the Hiya Hiya Small Interchangeable set. With 4" tips, 9.5" cable makes a 16" needle With 5" tips, 9.5" cable makes a 18" needle Need more flexibility? You can purchase HiyaHiya Interchangeable cables separately. Photo is a representation of the cable.