This 30" Galvanized Steel plate base is the perfect pick for beachside eateries and outdoor cafe dining areas. It features a corrosion and rust-resistant galvanized coating, with the option to include up to 3 steel plates for additional protection. Furthermore, its 1.5" diameter stem is compatible with all standard commercial umbrellas. Choose an 8" stem height to fit underneath the table or an 18" height stem for free-standing use. Made in the USA and covered by a 1-year commercial warranty.