The DUO divided bucket is our 8.5gal/36L split mop bucket. It has two compartments consisting of a 5gal/19L rinse water section in the rear and a 4.5gal/17L compartment for cleaning solution in the front. This allows the mop to release the majority of dirt and debris in the rinse water section after you have cleaned an area. This keeps the solution side less contaminated and reducing cross contamination. It comes with a down press wringer with a one year guarantee!