44 lb Heavy Duty Round Base Stand with Rolling Wheels for Outdoor Patio Market Table Umbrella, Black. High quality: durable resin concrete composite provides the best weather and sun protection outside Movable: antique cast iron look with smooth finish including 4 locking rolling wheels Versatile: adjustable holder to fit 1.5" (38mm) and 1.9"(48mm) diameter poles Widely used: suits 7-11 feet market umbrellas through a table or freestanding for porch and yard Double-lock design: 1 adjustable rotary knobs for securing the parasol to the base.