Deutsch HD30 Series Receptacle. Size 24 shell or 43mm diameter. Contains 33 size 20 sockets. Size 20 contacts are rated at 7.5A per circuit. 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.