This handy stringer was designed by our engineers to work hard and never come apart. It consists of three rubber outlet boxes which run on three independent circuits. The receptacles within each box are available in GFCI or Edison-style duplex, or a combination of the two. The bonding assembly eliminates heat and resistance buildup, and for your safety each quad box is tested to full ampacity prior to shipment. SOOW multi-conductor cable with 20A/30A NEMA male and female ends.