Combo can accommodate a 12-32 ounce mop. Specially molded mop bucket holds the optional 8-quart Dirty Water Bucket. Dirty water bucket is designed to separate dirty water from the clean water. It nests below the wringer to collect the dirty water only which keeps cleaning solution separate. The Dirty Water Bucket reduces the risk of cross-contamination and the divided liquid weight reduces injury when emptying buckets. For a color coded system these combos are available special order in brown, blue, green and red. Yellow side press combo. Qty. Per Pack: 1