Size: 15.75"(L) X 15.75"(W) X 0.39''(THK). Stable & Durable: Sturdy black powder-coated steel to prevent chipping and peeling. The screw design reinforced around the steel plate base can firmly hold the patio umbrella without a lot of wobbling. Space Saving: Thickness moderable, without worrying about tripping, leaving more space for your patio. Ideal for yard, deck, outdoor leisure area or other places. Easy to Assemble: All installation materials have been included, it can be quickly assembled according to the instructions and easy to use. PURPLE LEAF Heavy Duty Square Steel Plate Patio Umbrella Deck Base. Heavy duty steel construction in powder-coated finish, which make the umbrella base long lasting.