The A9 Monsoon is a heavy-duty, chassis mounted, regenerative air street sweeper with a 9.6 cubic yard hopper. The A9 has the largest standard hopper in the industry for unit of its size. Larger capacity means more sweeping and less dumping. Along with the largest hopper, the A9 Monsoon features the largest dumping door in its class allowing a full packed hopper to empty with ease. The large flow area and saw tooth drop down screen allows debris capacity all the way to the screens without plugging.