FeatureOnly compatible with 1-Tank system. Not compatible with 2-Tanks system Our spin mop replacement heads are made up of microfiber that is soft, strong absorbent, resistant to abrasion and super stain removal. The thick enough fibers ensure that they won't scratch your floor surface and won't get tangled up after absorbing water. Rounded Triangle DesignThe humanized design spin replacement mop head is made of high quality plastic with an overall rounded triangular design, which is not only lightweight but also durable. It can reduce the resistance of mopping and avoid unnecessary damage to the cleaned objects. Snap-in installationEasy to install,When installing, please make sure that the triangular base and the mop replacement pad are completely stuck and hear the "click" sound, ensure that water does not come off after absorption. Wet & Dry and Machine WashDeep Cleaning,Wet and dry can clean efficiently, more suitable for floors with smooth surfaces, such as wood, tile, laminate, marble floors and other sealed hard floors. Flexible 360-degree rotating mop head easily reaches under furniture, corners and spaces, easily remove and absorb stubborn stains. Package Includes6 mop heads & 1 base. The whole set of configuration to avoid the trouble of different installation sizes. Spin mop head refill are washer and dryer-friendly. More time and expense saving than traditional mop heads, reusable and perfectly replaceable many times.