The Simplex Aerospace Model 304 Fire Attack aerial firefighting
system for Bell 205A-1, 212, 412/EP, AB412, & UH1H (by specific STC). The system consists of a belly mounted carbon fiberglass tank, which holds 1,420 liters (375 gallons) of water or 114 liters (30 gallons) of foam retardant. Other features of the tank include a hover refill pump with a refill rate of 1,514 liters (400 gallons) per minute hover refill pump, corrosion resistant parts, cockpit controlled selectable drop patterns, and rapid installation/removal.

FAA STC'd Aft Hook also available for the Model 304. Optional Aft Hook secures the end of the hover pump to the belly of the aircraft until the pilot chooses to deploy the pump at the water source. Storing the pump during flight allows operators to transport firefighters to the fire site increasing the efficiency of the mission.