Package Includes: 1pc of blue microfiber strands mop refill Material: fine microfiber. soft and absorbent strings that will not scratch floor surfaces, attract dirt, dust and hair, for both wet and dry use. Looped End Microfiber Strands: better grip with the dirt and leaves no fabric lint. Twists Onto Any Standard US Threading Pole: mop head twist onto any pole with Standard US Threading (ACME 3/4 inch Thread). It fits most of mop handle or extension pole you already possessed. If you have any problem with compatibility, you can buy our poles or return it. Reusable and Machine Washable: made with fine microfiber, it could be washed with all kinds of disinfectants and with high temperature. Microfiber Cloth Mop Replacement