It is difficult to find bamboo large enough to produce sizes 17 and 19 needles. Because of this, all of the needles sizes 17 (12.75 mm) through 50 (25 mm) are made from wood. Surprisingly, they are still light weight and well balanced. The dark patina needles go through an additional thermal process to obtain the darker color. No dyes or paints are used to attain this richer color.
Image shown in not the actual/correct needle size.