HIFROM 1 Count Replacement Steam Mop, Pocket Pad, Microfiber for Shark S3550 S3901 Microfiber steam mop pads, size : 29x18 cm Designed for use with s3550,s3901 electric steam mop Ultra soft, won't scratch or smear floor surfaces Machine-washable for repeated use, easy to attach, replace used and worn out pads