ChiaoGoo interchangeable tips and cables, available in both bamboo and stainless. Tips come in both 4-inch and 5-inch lengths. Tips size US-000 to US-1.5 use [M] Mini cables. Tips size US-2 to US-8 use [S] Small cables. Tips size US-9 to US-15 use [L] Large cables. Pick whichever cable type you like, as both SPIN and TWIST cables can be used with either type of tip.