It looks like it was used once but at the same time there is 0 signs that water has passed through, so it could just be new open box. This Pentair IntelliChlor IC20 Salt Chlorine Generator Cell is designed to keep your pool clean and refreshing. Made by the renowned brand Pentair, this unit is perfect for those who want to maintain their pool with ease. Its Type is a Salt Cell and the Unit Type is in gallons with a capacity of 20K. Compatible with various pool equipment parts, this product is a must-have for pool owners.