Duplex Boat Cable is used in low-voltage AC applications as well as DC circuits. Pacer manufactures 18 AWG Duplex boat cable in-house in Sarasota FL, USA for the best quality. First, the cable is built from finely stranded, Type III tinned copper conductors. These conductors allow for flexibility and help to prevent corrosion. The proprietary PVC jacket helps 18 AWG Duplex Boat Cable to be flexible while preventing moisture from accumulating. How does it do that? During the extrusion process, the spaces between wires are filled. This leaves no space for moisture or air to accumulate. After that, a talcum powder coating is given to the interior wires. This coating is used to allow the outer jacket to be easily removed. Just another reason 18 AWG Duplex boat cable is perfect for marine use.This Duplex Boat Cable (EDMO# 18/2RYW250) is 18 AWG, has red and yellow cables with a white jacket, and comes on a 250 ft spool.