From the ChiaoGoo website:
With our Blue Shorties set you can make 9″ (23 cm) through 14″ (36 cm) circulars. This set includes 10 sets of 2″ (5cm) solid stainless steel & 3″ (8cm) hollow stainless steel interchangeable tips from US4 – US8 (3.5 – 5mm). Also included is a secure tip sleeve, three [S] diameter blue X-Flex cables (5″/13cm, 6″/15cm & 8″/20cm), end stoppers, tightening keys, connectors, stitch markers and a mini needle gauge all in a blue, pocket-sized nylon fabric pouch. The 2″ (5cm) tips have a tightening hole to ensure you get a secure connection.