The patio umbrella base measures 17.7 in. long, 17.7 in. wide, and 15.4 in. high. The base itself is 2.8 in. high, with the pole receptacle extending upward. These are the 2 most common pole sizes for residential patio umbrellas. The user measures the umbrella pole before purchasing. A caliper or a ruler provides an accurate measurement. The base works for a wide range of outdoor setups, including patios, decks, poolsides, gardens, and commercial outdoor dining areas. The concrete-filled base weighs 42 lbs. The adjustable knobs are 2 hand-turned tightening knobs. The knobs are made of plastic or metal with rubber grips. The user inserts the umbrella pole into the receptacle. The base requires assembly. An empty base requires the user to purchase concrete mix, mix it with water, and pour it into the base. The user allows the concrete to cure for 24 to 48 hours before using the umbrella. The elegant design features a rustic slated acacia wood grain exterior. The base is suitable for use with cantilever umbrellas that have a pole diameter of 1.5 in. And also suitable for use with market umbrellas. Color: Brown. Material: Steel.