The DuraVent 5DV48DW is a flex connector from DuraConnect, a collection of connector systems to be used in type B gas vents. This is to be used as a connector system to replace rigid gas vent with a flexible section. It has a diameter of 5 inches and a length of 60 inches. Applicable on a double-wall construction, it is also resistant to condensate corrosion and is a UL-listed product.DuraVent has been true to their commitment to become the technological leader in the venting industry. Add these high-quality and innovative products in your vent system as you find it here at PlumbersStock.com.