Plastic. Design offers dual grips for ease of removal of plug from socket and incorporates vinyl inserts to keep out dirt and moisture. Interior design prevents internal short-circuiting and the safety latch prevents damage from accidental pull-away. Color coded to RV standards. Detailed instructions permit use for both 6 and 7 way applications.

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov