ChiaoGoo Needle Tips 4-inch (10cm) for Twist Red Lace Interchangeable Set; Size US 10 (6mm) 7504-10 2 of 4" (10cm) Needle Tips for ChiaoGoo Twist Interchangeable Set, Size US 10 (6mm) ChiaoGoo Red Lace circulars are made of high grade stainless steel Each item is light weight and durable, precisely machined with satin finish with perfectly tapered tips Size is permanently laser etched on each item for added convenience and easy storage ChiaoGoo products are mostly made in Hangzhou, China, distributed from Troy, MI (USA) and adheres to the latest environment-friendly manufacturing processes; most products are 100% recyclable