Metapo Mop Add-on Attachment for Roomba 500 510 530 550 560 570 585 595 600 610 614 620 630 650 660 series Robot Vacuum with Water Tank Reservoir and 2 Mopping Cloths for Dry & Wet Floor Mopping Add mopping function to Roomba 500/600 series robot cleaners (Not working with Roomba 700, 800 and 900 series or unit with dual rubber brush). Great for dry mopping and wet mopping on hard floors (tiles, hardwood, linoleum and vinyl, etc). Full-width, large microfiber cloth provides effective coverage and excellent cleaning result. Add water or cleaning solution to water tank before wet mopping Measure your unit bottom 2 screw holes center to center distance, if it is 9 5/8", then mopping attachment will work with your unit, see photo illustration.