500-series Optimized 3366148-N is floating type, round frame for lockable, round blind cover 3366149-N. The frame 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.

The frame assembly is compatible with DN500 mm telescope pipe.

Typical applications are inners streets, car parks, pedestrian zones.