SPIN Bamboo Interchangeable 4" (10 cm) Tip Complete Set. Set includes tips in sizes US2 (2.75 mm) to US15 (10 mm) This set includes the following cable lengths: 8" (20 cm), 14" (35 cm), and 22" (55 cm) to make 16" (40 cm), 22: (56 cm), and 30" (76 cm) circulars. SPIN nylon cables allow the tips to swivel freely and have lifeline holes. Connectors, end stoppers, tightening keys, stitch markers, a needle gauge and a compact, green-ribboned, fabric case are all included with this set.