Our weathered bamboo double tips have precision handcrafted, tapered tips. They are made from Moso bamboo, the largest and strongest bamboo of over 1,000 different species. The patina finish is obtained by thermal heat. Sizes US 0 (2mm) to US 2 (2.75mm) come with six needles per set. Sizes US 3 (3.25mm) to US 15 (10mm) come with five needles per set. The size is permanently laser printed on each needle.