California Home Spas SHRUBBL Black Rolling Umbrella Base. The 110lb. Rolling Base is perfect for setting a solid foundation for your umbrella.  Crafted from fiberglass reinforced cast concrete and finished with stainless steel mounting hardware, the heavy-duty base is equipped with four locking caster wheels that allow you to effortlessly maneuver your umbrella to a new location whenever the need arises.  The SHaDE 110 lb. Rolling Umbrella Base is a perfect support for most free-standing market umbrellas.