The CeraGrav is a durable water filtration system , made from high density polyethylene. . The LP5 is the perfect water filter system for camping and hikers. CeraGrav is highly durable, making it the preferred choice for campers and hikers. The Doulton Gravity water systems hold up to 5 Imperial or Slimline Doulton ceramic filter cartridges. FDA approved material. The Gravity LP5 does NOT require power! Gravity is used to filter the water through the filters. Filters are not included. Dimensions: 28-9/16" H x 11-1/4" W x 11-1/4" D. Media: Ceramic / GAC (Granular Activated Carbon). Housing Materials: High Density Polypropylene.