The Agri-Fab, 18" x 24" Poly Push/Tow Behind Poly Lawn Roller #45-0610 will help restore a lawn to its smooth appearance after flooding or eliminate frost heaves caused by freezing and thawing. The drum can hold water or sand for additional down force. Water is the preferred choice when filling the drum as you will be able to empty the water out at the end of the rolling season, which makes storing the unit easier. For users who prefer to fill with sand, Agri-Fab recommends filling the drum only halfway full. The drum has a removable one-inch plug, which makes filling and draining easy. The roller's drum is made out of a sturdy polypropylene, which resists dents, rust, and weather damage. This roller will last you for years to come with proper care and use. As with most Agri-Fab products this roller comes with a with a 3 Year Limited Warranty.3 Year Limited Warranty