These Libman Wonder Mop Refill Heads serve as replacement mop heads for the #2000 Wonder Mop. Keeping more than one mop head is a great way to clean. One mop head for cleaning the bathroom floors and one for the rest of the house! The microfiber GRIP STRIPS lift 20% more stubborn dirt. It works great on all hard flooring surfaces. It is also machine washable up to 50 times. Combo pack contains 2 mop head refills Non-woven premium synthetic material with microfiber on the outer strips Works great on all hard floor surfaces Machine washable up to 50-times Easy to wring mop head