1. Exact Fit: Perfect replacement mop head for Spin Mop system. Inner triangular rim size 4'' and the outer triangular rim size 6'' in diameter. The spin mop replacement head will fit most standard easy wring spin mop that has a triangular shape. 2. Our mop refill made with Super Absorbent Microfiber Strands has soft, durable and machine washable absorbent strings that will not scratch floor surfaces. This mop replacement head is ideal for use in mopping all hardsurfaced floors and absorbs tough dirt and grime effortlessly. 3. Multipurpose: The mop refill has soft and perfect for smooth surface floors, absorbent strings that will not scratch floor surfaces. For dry and wet use. It suits for wooden floors, ceramic tile, laminate floors, marble floors and other sealed hard floors. Also, it can be used for car or window cleaning. 4. 360DEGREE SPIN MOP REFILLThe 360 degree spin mop head can easily reach underneath furniture, corner and inter space; this flexible mop head replacement is easy to install and very sturdy, so you can thoroughly clean all floor surfaces.