Sponge Mop Refill Head 2-Pack for Tile, Bathroom, Garage Cleaning, Easy Wringing
It can only fit Yocada's sponge mop. How to install the sponge head: Aim at the groove, use your strength to insert the iron clamp on the sponge head into the groove. And if you want to remove the sponge head, pull the ring on the mop head out.