All bases and base stands are individually boxed, unweighted, and available in five colors. Fully weighted, these bases offer slightly over 50 lbs. of heavy holding force for any umbrella. Each model features a locking screw-on cap to hold the sand weight inside it¿s durable molded resin body. This feature enables dealers or consumers to purchase sand for weighting at their local home stores and easily fill the bases with sand themselves to reduce shipping costs. All stainless steel hardware.