These are great little external use junction boxes, they have a clever rubber seal for the glands.
Accepts 3-12mm Cable Diameters
Integrated thread for cable glands
Terminals/Poles: 4mm and Voltage: 400V
This junction box has an IP66 weatherproof rating, is shatter proof, impact resistant, and ideally suited for outdoor installations. There is no need for locknuts as there is an integrated thread in which cable glands can be directly mounted. It uses plastic screws in order to prevent rust, they close the box with only a quarter turn.