The ChiaoGoo Patina 24" Circular Needles are crafted from Moso bamboo, a strong and durable variety. Circular needle sizes US 0-2.5 feature a memory-free cable found on ChiaoGoo's RED circular and TWIST cables. For circular needle sizes US 3 and larger, a flexible nylon cable is used, allowing the tips to swivel freely, while the nickel-plated copper join is both glued and crimped to ensure no separation occurs. Needle sizes are laser imprinted on the needles for easy identification.