replacement power cord end commonly used on RV or Marine with 50 amp service. Color coded terminals for easy installation W=white wire G=green wire X=red wire Y=black wire New RV 50Amp 125V Female Twist Cord Connector-Weather Proof Boot Kit -50 Amp Twist Locking Connector -50 Amp Weather Proof Cover -For use in converting non-detachable power cord into a detachable power cord with A weather proof seal. -Made with corrosion resistant materials and easy to install.