4 pack spin mop heads replacements: We recommend replacing the mop head refill every 3 months for optimal floor cleaning results, so all mop heads can last up to 1 year. Save your time and money. Wide applications: This triangle spin mop replacement heads suit for wooden floors, ceramic tile, laminate floors, marble floors and other sealed hard floors. Plus: for walls or windows cleaning too. Both dry & wet use. The dry mop refills to clean dust or hair, and the wet mop refills to remove stains, meeting various needs. Furthermore, the mop fibers are super absorbent, fluffy and soft which can absorb tough dirt and grime effortlessly, and no harm to floor surface when cleaning. High-quality microfiber spin mop refill: made of 100% durable anti-abrasive microfibers, machine-washable and reusable. NOTE: The spin mop replacement head compatible with O Cedar RinseClean spin mop 2 TANK system ONLY! Not compatible with EasyWring 1 TANK system.