Prospan pneumatic shoring from Prospan Manufacturing is designed to meet the OSHA excavation standard 29CFR 1926.650 that governs the safety of workers in trenches. It is an air-driven telescoping aluminum shoring device that delivers compressive forces to the trench wall, preventing collapse. Made of anodized aluminum and stainless steel, the shoring is available in four sizes spanning 21.5 to 105 inches and weighing 15 to 32 pounds. A variety of extensions and end attachments enable the user to shore practically anything encountered. 888/413-8100; www.prospanshoring.com.