Lantern Moon's Interchangeable Needles are made of beautiful Ebony wood and brass connectors with a 24K Gold finish. Combine with one of several options of cord lengths to achieve the overall length you desire for your project! Very useful if you often find yourself using the same needle sizes but need different lengths of circular as you move from one project to the next. This special 4" option is usually chosen when a shorter circular is desired (under 24"), but a 5" IC option is an available too, resulting in a large array of needle & cord combinations. 4" IC US 6