Knitter's Pride Karbonz 6" Double Pointed Needle Set includes needles in US sizes 0 (2.0mm), 1 (2.25mm), 1.5 (2.5mm), 2 (2.75mm), 2.5 (3.0mm), and 3 (3.25mm). Karbonz needles have the spectacular flex and tensile strength of carbon fiber, the same material used in aerospace engineering, with a warm feel like wood.