Rubbermaid Commercial Continuous Roll Dust Mop - 5" Width x 40" Length - Cotton - 1 / Carton -to-length Dust Mop cuts big floor cleaning costs down to size. The continuous 40' (12.2 m) roll yields 20 percent savings over conventional Rubbermaid dust mopheads. -to-length convenience lets you customize your mophead to fit any standard mop frame. Untreated, -end, four-ply cotton yarn provides excellent dust pickup. Durable Typar backing gives long life. Innovative slide-in backing easily secures mop on the frame. Laundering is not recommended for -end fibers.