DURABLE CONSTRUCTION - Made of rugged, weather-resistant HDPE plastic, with molded injections and UV-protection to prevent cracking and material degradationVERSATILE BASE - Compatible with offset umbrellas equipped with a cross base up to 11 inches long, or conventional market umbrellas with a cross baseRETRACTABLE CARRYING HANDLES - After emptying the ballast, utilize the included carry handles to move the base from the patio to the lawn and moreINTERLOCKING PLATES - Keep your umbrella upright against heavy winds and prevent accidental damage from tipping over (NOTE - Umbrella and cross base not included) FILLABLE PANELS - Interlocking plates connect with four metal hooks and feature easy-to-fill spouts to hold approximately 160 pounds of sand or 115 pounds of water (total)DIMENSIONS - Overall Dimensions - 39.75"(Dia) x 3.25"(H)Water Weight (per panel) - 28.66 lbs.Water Weight (total) - 114.64 lbs.Sand Weight (per panel) - 39.68 lbs.Sand Weight (total) - 158.72 lbs.Weight (total empty