Perfect CompatibilityPerfect mop heads replacements and microfiber spin mop refills are compatible with Oceda EasyWring 1-Tank mop system. Inner triangular rim size 4 inch,and the outer triangle rim size 6 inch in diameter.Perfectly compatible with 1-Tank spin mop, thick and durable, dry and wet, can work easily and perfectly.(Not fit 2-Tank System) Machine Washable:The microfiber mop head replacement is machine washable and reusable! We recommend replacing the mop head every 3 months. The microfiber mop head can easily remove and absorb stubborn dirt. mop replace head is easy to clean,and freeing your hands after heavy housework.Just put it in the washing machine and air dry it, and then you can refresh and reuse it to make it cleaner Microfiber: Our spin mop heads replacements are made of 100% super absorbent microfiber thread,durable and machine washable, with a soft, super absorbent cord that will not scratch your clean surface. This flat head mop is very suitable for moppin