Standard unloaders are available for 2.2" (55mm), 3" (75mm), 3.5" (90mm) and 5" (125mm) Flex-Flo™ or 4" and 6" rigid auger systems and are designed to fit below the 16" (406mm) plastic and 22" (559mm) metal boots. All unloaders have an ultra-high impact, polypropylene slide-gate above the auger to meter feed or serve as a complete shut off. A convenient inspection/clean out plate, located on the side, is easily removed with two wing nuts. They also feature a heavy duty ball bearing for increased service life and reduced maintenance.