Perfect Compatibility: BONBELONG The mop head fits the Triangle Spin Mop. Has inner triangular rim size 4 and outer triangular rim size 5.7 in diameter. Perfect Mop Heads: Made of 100% microfiber, streak-free cleaning, effortlessly removes and absorbs stubborn dirt and grime. Red fibers absorb 20% more particles than conventional microfiber yarns Easy to install: just pull the strands of the mop to unclip the head and replace it by pushing it into the Red frame until you hear a click Suitable for all floors: Suitable for all types of hard floors, including wood and laminate. Easy to wash Hand wash and machine wash, reusable and more convenient Easy to install Just insert it into the mop according to the direction of the picture. When installed correctly, it is strong and durable and not easy to fall off. Premium fiber Super absorbent microfiber wicks that are durable and wont scratch the surfaces you clean.