Sold as one unit. (1 unit = 4 each.) For wet mopping. Non-woven premium synthetic material. Absorbent machine washable. Steel handle with hanger hole. Special wringer sleeve - more holes and deeper groovers wring more water. Your hands never touch water. Great for all surfaces - hardwood, ceramic tile, linoleum and stone. Replace mop head every 50 uses for best performance. Refill SKU # 1361559. Overwrap. Manufacturer number: 071736020006. SKU #: 1361534. Country of origin: (TBA). Distributed by Libman Company, Inc.