This vibrant rainbow coloured interchangeable circular needle set is made of a strong, polished, smooth laminated birch wood. Yarn slides freely along the needle without catching, but has enough grip to easily manage slippery yarns. The Short Options Interchangeable Needle Set is designed with shorter needle tips that connect snag-free to our distinctive emerald cable. This set includes two cables - simply attach the needle tips to create to create a versatile 16" interchangeable circular needle perfect for hats, sleeves, and other, more compact projects. Tip sizes are US 4,5,6,7,8,9,and 10 (3.5, 3.75, 4, 4.5, 5, 5.5 and 6mm).