best choice products 4-piece heavy-duty cantilever offset patio umbrella stand square base plate set w/easy-fill spouts for water or sand - black best choice products <b>specifications:</b><br>overall dimensions (one plate): 19.7"(l) x 19.7"(w) x 3"(h)<br>overall dimensions (four plates): 39.7"(l) x 39.7"(w) x 3"(h)<br>capacity (per plate): 13.2l of water, or 38.9 lbs. of sand<br>weight: 19 lbs.(unfilled)<br>weight(filled): 52.8l(water) <br>weight(filled): 155.6lbs.(sand)<br>material: plastic<br>no assembly required<br>note: crossbar not included.<br><b>package includes:</b><br>(4) base plates<p>bcp sku: sky3257</p>