Your replacement head only fit for the newer model 2-tank system only! NOT for the 1-Tank system bucket mop! Before use, please make sure that the three corners of the mop head refill are completely installed in the mop base and hear the "click" sound, otherwise it may come off. What you will getYou receive 10 pack rinseclean spin mop replacement head,which are great replacement mop head spin mop for normal house cleaning( We recommend replacing the mop head refill every 2 months for optimal floor cleaning results.) Good QualityThe mop head is made of ultra-fine fiber, high softness and super absorbent that will not scratch the surfaces you're cleaning. Also our microfiber mops provide deep-cleaning solution for all your home and floor cleaning needs by effectively removing dirt, grime with just water! Making Mop Easier- These mop head has superior decontamination ability, both dry & wet use, the dry mops are used to absorb hair, dust, while wet mops are used to remove stains, meeting your various needs. Wide Applications: The microfiber spin mop refill uses the power of microfiber to give your floors a deep clean. Ideal for the wooden floors, ceramic tile, laminate floors, marble floors. For dry and wet use. the dry mops are used to absorb hair, dust, while wet mops are used to remove stains, meeting your various needs.