If you own a spinning mop, you know how important it is to have fresh refill heads ready to go! These microfiber mop heads are designed specifically as replacements for The Ultimate spinning mop (model HH# 4540-847). The double loop yacht knots in the microfiber are super effective at grabbing hair, dirt, and dust from all your floor types - tile, hardwood, laminate, you name it. They clip on to your spinning mop handle easily and stay secure while you're cleaning. When you're done mopping, just toss them in the washing machine to get them clean and ready for next time. Having fresh refills means your mop will always work effectively - because let's be honest, a dirty mop head just spreads dirt around instead of actually cleaning! These are genuine replacements that fit perfectly and work exactly like the original heads. Perfect for keeping your spinning mop system working like new without having to buy a whole new mop. Stock up so you always have a clean refill ready when you need to do some quick cleaning around the house!