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Grain Guard Rockets, and Retro Rocket Grain Bin Aerators Farmers have trusted the dependable grain bin aeration expertise of Grain Guard for over 25 years. Now the classic Rocket design has been improved - The Rocket Next Generation is an innovative, stronger, and even more reliable Rocket. The smooth louvered surface allows for cleaner unloading. This new aeration system has improved performance through re-design to provide more air delivery to the center of the hopper, where the air is most difficult to move. The fan's new reduced weight, re-designed side legs, and internal support rings provide greater structural strength, up to 125% greater than the Classic Rocket. Plus, the improved design results in increased vertical loading up to 30' in grain height. The design allows the installation of the Next Generation Rocket into commercial applications by simply adding extras legs, up to five on the 7000 series and up to eight on the 8000 series. Features: Improved air delivery performance New reduced weight Designed for increased structural strength 3 leg design for better stability Allows 30' grain height vertical loading Withstands increase in side loads from irregular grain flow when unloading. Option for Hopper bottom bins without aerat