7123 ChiaoGoo Twist Shorties Combo Packs Needle Tips. The Combo packs contain one 2"(5cm) and one 3"(8cm) set of the same size tip as well as two cables allowing knitters to make 9"(23cm) - 12"(31cm) circulars. Tips sizes 000- 3 (1.5-3.25mm) are solid, have a MINI diameter join and tightening hole. Tip sizes 4 - 8 (3.5-5mm) are hollow and havea [S] join and come with the NEW blue X-Flex cables!