Fuji Keiki Bubble Meister Washing Machine Ultra Fine Bubble Generator Adapter Enity Bubble Meister for Washing Machines Unused For fully automatic washing machines Ultra fine bubble generator adapter G3/4 screw type No installation required Easy to install The power of tiny bubbles Removes dirt with great force Keeps both laundry and the washing machine clean Since I started using this with my washing machine It has become less prone to mold This is my personal experience, so I can't say for sure if everyone will have the same results. I bought this for my parents' house, but they're not using it, so I'm selling it. The box is still in good condition. Please understand that some time has passed since purchase. Thank you.