550/50 D400 3366020/21-N consists of a floating, round frame 3366020-N and blind cover 3366021-N. The set is designed for Nordic conditions, in accordance with standard EN124-2:2015, manufactured from grey cast iron EN-GJL-200 and is classified under Load Class D400.

Cover can be opened using a magnetic lifter CW1600. The set assembly is compatible with 560 mm and 630 mm telescope pipe.

Typical applications are service stations, industrial buildings, heavy vehicle car parks, public roads.