FITS 6-12FT MARKET UMBRELLAS:This heavy duty umbrella base features a steel pipe, fit pole 1.5-1.9FT , perfect for holding 6-10FT umbrellas. HEAVY DUTY:A heavy weighted base keeps your umbrella firmly in place-resisting the wind while supporting your shade REFILLABLE RESERVOIR:Fill the hollow chamber with 81 pounds of water, then use a pair of tightening knobs to secure your umbrella,refillable umbrella base. EASY MOBILITY:Come with 4 fixed wheels, this umbrella base can be moved easily while 2 locks keep stability. Easy Storage: Empty it out for a lightweight umbrella base that can be taken anywhere.