This 7-foor (2.1m) extension cable features RV-style (flat pin) 7-prong connectors on both ends to allow for easy hook-up of Fifth Wheel and Gooseneck trailers. Durable plastic connectors, weather resistant. They will not be affected by weather or temperature change. The black plastic socket has a non-corroding, shock-resistant interior design. A weatherproof, insulated lid covers the terminals, and the cover is extra-durable and easy to open. Easy installation and great value.