The Libman Nitty Gritty Roller Mop Refill is a pack of two tear-resistant sponge refills designed specifically for the Libman Roller Mop. Made in the United States, these multicolor refills are suitable for use with the Nitty Gritty model of the Libman Roller Mop. The sponge material ensures effective cleaning, making it a convenient and durable choice for maintaining cleanliness in your home.