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For Sale, The 440BU is a propane powered, ultra-high speed burnisher manufactured with premium features to satisfy the needs of floor care professionals around the world. Replacing the popular SpeedStar™, the 440BU is available in three different widths – 21, 24, and 28 inches (53, 61, and 71 cm, respectively). Each model comes standard with a 12 volt battery start, catalytic muffler, handle bail clutch, wrap around steel skirt, CentriVac™ dust control system and SafeSense™ emissions monitoring system. Powered by an 18-HP, 603 cc Kawasaki engine, the 440BU uses 34 percent less fuel and requires 40 percent fewer oil changes than other machines in its class.