This pair of needles are heat-treated for strength and durability and are polished for a smooth finish. Each needle is color-coded so you can find the size you need at a glance. The knobs feature a no roll design and US and metric sizes are clearly printed on the knob. This 3.25x17.5 inch package contains one pair of size US 35/19mm needles. WARNING: Choking Hazard. Not suitable for children under 3 years. WARNING: May contain items with sharp edges. Handle with care.