EASY MOBILITY: A set of four wheels allow you to effortlessly move this base back and forth while two locks keep your shading in place REFILLABLE RESERVOIR & TIGHTENING KNOBS: 2-fold stability system uses a pair of tightening knobs to ensure a secure fit while the fillable base holds up to 123.2 pounds of sand or 37 liters of water. USE IT ANYWHERE: Perfect for any patio, deck or outdoor seating area, with a set of two wheel locks for extra security FITS MARKET UMBRELLAS 6-12FT: A contemporary design blends with most outdoor decorations and fits most market umbrellas sized 6-12ft with poles sized 1.5-1.9in. PATENTED DESIGN: This unique and original design was created by our in-house product developers and is exclusive to Best Choice Products; OVERALL DIMENSIONS: 22"(L) x 22"(W) x 7"(H) &lessthan;b&greaterthan;Specifications:&lessthan;/b&greaterthan; &lessthan;br&greaterthan;Overall Dimensions: 22"(L) x 22"(W) x 7"(H) &lessthan;br&greaterthan;Receiver: 10.5"(H) x 2"(Dia) &lessthan;br&greaterthan;Filling Capacity (Sand): 123.2 lbs. &lessthan;br&greaterthan;Filling Capacity (Water): 37 L &lessthan;br&greaterthan;Weight (Empty): 14.3 lbs. &lessthan;br&greaterthan;Weight (Filled w/ Sand): 137.5 lbs. &lessthan;br&greaterthan;Weight (Filled w/ Water): 95.7 lbs. &lessthan;br&greaterthan;Material: HDPE Plastic &lessthan;br&greaterthan;Suitable For Poles: 1.5"-1.9" &lessthan;br&greaterthan;Minimal Assembly Required (with instructions) &lessthan;br&greaterthan; &lessthan;br&greaterthan;For Residential Use Only&lessthan;p&greaterthan;BCP SKU: SKY5897&lessthan;/p&greaterthan;