The outer insulating shell of the connector is made from nylon and houses a small tinned copper barrel. Our Steadypower 4/0 Pigtail features Type W black cable and a color-coded male or female cam-connector on one end and a bare wire on the other end. 30 gauge bare copper stranding. Excellent Flexibility EPR/CPE single conductor portable power. Available in multiple styles—including Bonded-Pair and Non-bonded—to align with your installation preferences, Belden's Copper Pigtails come with a snagless, overmolded boot on the plug end for high-performing strain and pull relief. You do not need to strip the ends of your wires. Durable. The Amico copper pigtails shall have a 5/16" x 0.