1. Microfiber mop head replacement is only suitable for Libman Tornado Spin Mop. Package Only includes 4 Pack mop head replacement(Without Bucket and Mop Handle) Product Size:Inner Diameter 7.1 inches,Whole Mop Head Diameter 14.6 inches.Please double check your mop bucket type before . 2. Mop Head Replacements are made of high quality soft microfiber material,strong water absorption,efficient cleaning,great for Wet and Dry use,a musthave cleaning helper for household. Specifically designed for the Libman Tornado Spin Mop, this pack comes with 4 replacement mop heads to ensure longlasting usability, Replace every 3 months or sooner with frequent use. 3. The spin mop head replacement can be hand washed with warm soapy water or machine washed in a mesh laundry bag and hung to dry. Easy to remove and replace, longlasting use. 4. Mop head refill for Libman Tornado Spin Mop System has great absorbent,will not leave water stains on the floor or pushing dirt around,and microfiber material is to floor,avoid scratch and other damage.