Designed to clean and filter water specifically for the Opal Nugget Ice Maker. Imagine indulging in a glass of ice-cold beverage, with each nugget ice piece bursting with refreshing taste. Compatible with all full-size Opal Nugget Ice Maker models, including XPIO13SCSS, XPIO23SCSS, XPIOX3SCSS, XPIOX3SZSS and more.