The Agri-Fab, Inc. 18″ x 36″ Poly Tow Behind Lawn Roller #45-0268 will help restore a lawn to its smooth appearance after flooding or eliminate frost heaves caused by freezing and thawing. The drum can hold up to 400 pounds of water or sand. 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. When filling the drum remove the one-inch plug. The poly roller comes with a scraper bar that removes any debris that sticks to the drum. The roller’s drum is made out of a sturdy polyethylene, which resists dents, rust, and weather damage. This roller will last you for years to come with proper care and use.