Umbrella Base, Overall Diameter 21 in, Includes Wheels No Wheels, Stem Height 13 in, Color Black, Material Resin, Maximum Weight 40 lb, For Pole Diameter 1 1/2 in, Features Will Not Stain or Mar, Fill with Water or Sand, Will Not Peel or Rust in Sun, Includes (2) Thumb Screws, Filling Cap, Ballast Required Yes