Rubbermaid Commercial Adaptable Flat Mop Wringer Insert - For Mop, Wringer - Black - 1.5" Height x 8.4" Width x 8.5" Length - 1 Each The Adaptable Flat Mop Wringer Insert fits seamlessly into WaveBrake side-press wringer for optimal wringing of Rubbermaid Commercial Adaptable Flat Mop Pads. Using the wringer insert enhances the operation of the side-press wringing, squeezing out more liquid. It is easy to use. Simply slip into WaveBrake Side-Press Wringer before wringing out Adaptable Flat Mop pads.