From the ChiaoGoo website:
Sets include 5″ (13 cm) bamboo tips and three clear, nylon cable lengths to make 24″ (60 cm), 32″ (80 cm) and 40″ (100 cm) circulars. SPIN nylon cables allow the tips to swivel freely. Also included with each set are easy-to-read, coded cable connectors, end stoppers, T-shaped tightening keys, stitch markers, a needle gauge and compact, zipper-enclosed, fabric case. SPIN & TWIST tips, cables and accessories are all switchable!
Set includes 2.75-5 mm/US 2-8 sized needle tips.