Portable Round Umbrella Base Weights &ndash; Three Pack 18" Diameter Round design  easy to use and portable - Just fill with water to add weight Folds up small for transport, weighs only a few ounces. Package contains 3 Units Simply Fill with water from a hose for a weight of up to 25lbs each Designed for outdoor use, manufactured with industrial grade material to reduce wear from UV exposure All Products come with a 30 Day no questions asked money back guarantee and are warrantied for an entire year.