Spin mop duo has a 19 liter water tank. get ready for an effortless and flawless cleaning experience in every corner of your home with the spin mop duo. with the spin mop duo, dirty water and clean water do not mix, so you do not have to change water every time. duo cleaning set 19 lt. clean water and dirty water tanks do not mix with each other. clean water and dirty water tanks are separate from each other. they can be attached to and separated from each other, but dirty water and clean water never come into contact with each other. thus, you can clean in an extremely hygienic way. you can continue to wipe and clean with clean water every time without continuing to wipe with dirty water. more than 100 stocks are offered to be sold at the campaign price. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.