Umbrella Bases / Durable Molded Resin Bases. All are individually boxed, unweighted, and available in five colors. Once weighted, these bases offer slightly over 50 lbs, of heavy holding force for any umbrella. Each Resin Umbrella Base features a locking screw on cap to hold the sand weight inside it's molded resin body. The locking screw on cap makes filling the base with sand, pebbles etc. convenient and easy. Each umbrella base comes with rust resistant stainless steel hardware. (Sand, Pebbles, Water, etc. not included)