Deutsch HD30 Series Plug. Size 18 shell or 38mm diameter. Contains 14 size 16 pins rated at 13A per circuit. This connector is specially designed for use with extra thin walled cables. These industry proven connectors are environmentally sealed to IP67 standards. Able to be used in both inline and bulk head applications. They have a quick connect bayonet style coupling. Specifically designed for the truck, mining and construction industry.