3 pin black thermoplastic plug/socket having two larger pins and 1 small pin. All terminals are nickel plated and are rated at 2x25A and 1x5A respectively. Plug diameter 30mm and overall length 70mm and comes with plastic dust cap for when not in use. Socket has mounting flange and spring loaded cap to prevent water ingress when not in use & rubber cable shroud. Internal connections via 2 x 6.3mm & 1 x 4.8mm blade terminals.