600-series set 3366171-N consists of a floating round frame 3366167-N and a round grating 3366169-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 F900.

Cover can be opened using a magnet lifter CW1600.

Typical applications are harbours, airports, military sites and others where high load bearing is needed.