Check the listing for details. 4-Piece Heavy Duty Cantilever Offset Patio Umbrella Base Stand Square Plate Set. Color: Black, Condition: New. Listed at 50.58 USD. Specifications:Color:BlackMaterial:HDPEItem Weight:7.65kg/16.86 Product Dimensions:51*50.5*7.2cm/20.08"*19.88"*2.83" Features:Sturdy Design: Made with interconnecting pins to lock your umbrella base in place and secure it for hours of enjoyment (Note: Crossbar base not included)Easy-To-Fill Spouts: Each plate is built with a fill spout and a twist cap to create a water-tight seal for quick and easy refills, ballast disposal, and relocationHigh Weight Capacity: The plates can hold up to 15 liters of water (per plate) or 50 pounds of sand (per plate), so your patio umbrella will remain upright in heavy windsHeavy Duty & Weather-Resistant: Made of HDPE plastic to withstand impact and constant movement, and treated with a weather- and UV-resistant coatingEasy To Assemble: The base comes with an umbrella pole holder. It is connected with the bottom of the base with a three-pin buckle, so that the umbrella can be firmly fixed with the basePackage Includes:1 x Base1 x Instruction