The Rubbermaid Commercial Products Down Press Mop Wringer works with WaveBrake buckets and stores 16-32 ounces of liquid. The mop wringer works with 35- or 44-quart Rubbermaid WaveBrake mop buckets. It has a tubular steel press arm with a contoured handle for better grip. 30% more effective than side press wringers, allowing users to get the most water out of the mop with every wring.