Since their invention of the first automatic scrubber in 1953, Clarke continues to lead the industry in design, development, and production of high quality autoscrubbers. The Clarke SA40 20D 20" Stand On Autoscrubber with 208 Ah Wet Batteries (56104484) is no exception to this record, with it's unique features and reliable Clarke construction it will help increase productivity and maximize cleaning results. The SA40 is designed with a large 12 gallon solution and lower flow rate to provide up to 75 minutes of cleaning without the need of refilling. This allows for more time spent scrubbing and less time spent maintaining the machine. With 75 pounds of down pressure it effectively cleans in a single pass.