Shop Nilight 100FT 20 Gauge 3 Conductor Electrical Wire Tinned Oxygen Free Copper Red Black Yellow 3 Wires Parallel 600V DC Flexible PVC Case Extension Cords for LED Strips Lamps Lighting in high quality, support 2 year warranty. 20 AWG wire has a high quality PVC jacket that can be twisted and stretched at will. High precision oxygen-free tinned copper has good electrical conductivity, and the tinned layer effectively prevents the copper conductor from oxidisation due to contact with oxygen.