Super Vac Translucent "L" Duct
The "L" Duct is an extremely useful duct that is held open by air pressure from the fan. It folds up to take very little space when not in use. Once deployed, men and equipment can pass by easily in cramped spaces by simply collapsing the duct. Light is able to pass through the reinforced translucent vinyl. "L" Duct may only be used on discharge side of fan.