Houston, TX: Made of heavy-duty aircraft aluminum, this mobile access platform is ideal for positioning workers over tank manways. Lightweight urethane wheels make it easy for one person to move the platform. Hand-operated winch provides easy height adjustment to accommodate a variety of tanks. Adjustable platform has guardrails. Flexible Lifeline Systems• LARGE Platform Height - Adjustable range: 17'-29.5', Adjustable range: 18'-30.5 • MEDIUM Platform Height - Adjustable range: 13.5'-22, Adjustable range: 14.5'-23' • SMALL Platform Height - Adjustable range: 10'-14.5', Adjustable range: 11'-15.5'