Ledge Lounger™ LL-U-PNC-PSB555 40" x 40" x 2" Round Pinnacle Galvanized Steel Plate Stack Cantilever Base, take a seat in the shady side. Our galvanized steel plate stack base is the perfect way to provide clean, minimalistic security to an umbrella any season all year long. Designed for our Ledge Lounger™ Ultra and Pinnacle cantilever umbrellas, this steel base features a sleek, durable, finish in the stackable shape of your choosing and guaranteed to withstand wind, rain, and shine.