Created to match the material(s) of Telescope Causal's collections of tables and chairs, and to insure your Telescope Casual umbrellas stay supported and upright, the company developed a selection of umbrella bases each with its own unique make and look appeal. This collection features cast aluminum, cast iron, steel, standard aluminum, and plastic resin bases predominantly round shaped (with steel offered in a flat square shape) so you can find the exact base that best fits with your outdoor arrangement. Each umbrella base can be custom ordered in a choice from a variety of finish color options and while best suited for use with Telescope's umbrellas, these bases should fit other umbrellas as well (check hole size before purchasing your umbrella.) This collection is backed by a 3 year residential/commercial warranty.