900-series D400 set 3366137/8-N consists of a floating, round frame 3366137-N and a round blind cover 3366138-N. The set is designed for Nordic conditions, in accordance with standard EN 124-2:2015, manufactured from ductile iron EN-GJS-500/7 and is classified under Load Class D400.

Typical applications are service stations, industrial buildings and district heating.