HiyaHiya Interchangeable Needle Tips 4-inch (10cm) Steel; Size US 6 (4mm) HISTINTIP4-6 1 x HiyaHiya Interchangeable Needle Tips 4-inch (10cm) Steel, Size US 6 (4mm) HiyaHiya Steel double point needles are made with high quality stainless steel Our steel interchangeable needle tips have nearly invisible screw on joins and a smooth but not too slippery finish Lifetime Product Warranty: If purchased from an authorized dealer, HiyaHiya guarantees all products against all manufacturing defects; warranty excludes products damaged due to accident, misuse, abuse or negligence