Ultra-Site 358-RDV 46" Diamond Round Table is highly durable and requires very low maintenance. They are often some of our most popular picnic tables, made from metal with a sturdy thermoplastic finish. Many of the Thermoplastic Picnic Tables we offer are made with holes in them to help prevent any standing water. This is a great option for rainy areas. When planning to buy outdoor furniture for your park, school or facility, it’s important to consider buying ADA Picnic Tables. Regardless of the outdoor setting, ADA-compliant picnic tables are always needed. There are many different types of picnic tables offered at UltraSite that are ADA compliant.