The PF-4-250-450-30S-3P is a three phase (400V 50Hz) sucker 4 Pole (1350rpm) plate mounted 350mm axial fan. Mounted with 4 mountings on wall plate (535mm Mtg Ctrs) and supplied with terminal box. A fan assembly offering superb build quality by Remco. The PF-4-250-450-30S-3P is a three phase (400V 50Hz) sucker 4 Pole (1350rpm) plate mounted 350mm axial fan. Mounted with 4 mountings on wall plate (535mm Mtg Ctrs) and supplied with terminal box. A fan assembly offering superb build quality by Remco.