PERFECT FIT: The Pocket Mop Pad with hook and loop strip closure is easy to set in, works with Shark Steam Pocket Mop: S3500 series, S3501,S3550,S3601,S3601D,S3801,S3801CO,S3901,SE450,S2901,S2902,S3450,S3452,S3455K,S3501SPN,S3501WM,S3601C,S3601CO,S3601K,S3601Q,S3601W,S3601WC,S3901A,S3901C,S3901D,S3901FS,S3901K,S3901Q,S3901W,S3901WC,S3901WM,SE400^ UPGRADE REPLACEMENT PAD: Double side MICROFIBER THICK NAP PAD can extend your cleaning session while easily remove dirt, grime, and stuck-on messes with no harsh chemicals^ PROMOTE THE STEAM MOP WORK: Sandwich mesh lining allows the steam to release easily. Strong water absorption, dry fast, effective remove tough and sticker messes, trap & lock pet hair^ SAVE MONEY, SAVE THE EARTH: The steamer pads are machine washable for repeated use, work on wooden floors, ceramic tile, laminate floors, marble floors and other sealed hard floors^ BUYER NOTICE: This is a standard size mop pad: 12.6 x 7in/32 x 18cm; NOT XL/extra large size pads, NOT fits the XL(16 x 6 x 1 inches) mop head, NOT fits the model with one wider and one narrower rectangular mop heads S3501, S3601CO or S3801CO