Specifications:Color: BlackMaterial: HDPEProduct Dimensions: 21.5" x 21.5" x 16"Net Weight: 6 lbsPackage Includes: 1 x Fillable Umbrella Base,2 x AdaptersDescription:Keep your market umbrella securely positioned with this fillable umbrella base designed for patios, decks, balconies, and outdoor dining areas. The base can be filled with water, sand, or a combination of both to provide adjustable weight for compatible center-pole umbrellas. A large bottom fill opening makes filling and draining quick, helping simplify seasonal storage. An adjustable tightening knob and two included adapters allow the base to accommodate umbrella poles ranging from 1.5 to 1.9 inches in diameter. It is compatible with 6 ft to 10 ft market umbrellas and is intended for use with center-pole umbrellas. Two rolling wheels and integrated grooved handles make it easy to reposition the empty base as the sun shifts throughout the day. The textured black finish blends with a variety of outdoor furniture styles, while the included instructions help make assembly straightforward.