The PRO-Lite from Prospan Manufacturing is a lightweight aluminum trench shield that weighs under 100 pounds. It stands 3 feet tall and comes in either the 5- or 7-foot length. Each shield is stackable to the maximum depth of 12 feet. Each shield requires two spreader bars, either fixed-length or adjustable. Storage, transport and deployment of the shield is easy. 630/860-1930; www.prospanshoring.com