Class 6 Oxygen-free copper yellow Class 6 oxygen-free copper Red Class 6 Oxygen-free copper Dark blue Class 6 oxygen-free copper Light blue Class 6 oxygen-free copper gray Class 6 oxygen-free copper Orange Class 5 oxygen-free copper yellow Class 5 oxygen-free copper blue Class 6 Oxygen-free copper Gray class 6 oxygen-free copper Orange Class 5 oxygen-free copper yellow Class 5 oxygen-free copper blue