The Nova offers maximum shade and weather protection for commercial environments. Reinforced extruded aluminum ribs connect to an impressive 4-inch mast supporting a 9 oz. marine grade acrylic canopy. The Nova is exceptionally designed to withstand harsh conditions while being virtually maintenance free. A commercial grade telescopic crank allows you to completely close the umbrella without the burden of moving furniture underneath. Umbrellas comparable to the Nova in size and weight almost always require a permanent installation. The Nova is one of the only large shade structures in the industry with a semi-permanent and non-permanent mount available. Umbrella base is additional.