IntelliStage's 4' x 4' Quarter-Round Stage Platform Base lets you build the stage that fits your performance. Attach the accordion-style legs to the platform using the interlocking system; use them individually or together, forming a half-circle. Aluminum construction is lightweight but can support 185 pounds per square foot. Fold for compact storage. Add 64 inches of height to your unit with riser extension hardware (sold separately). Step platforms are recommended for all stages higher than eight inches (also sold separately).