DuraVent DuraConnect 4 in. Dia x 24 in. Double-Wall Flex Connector

DuraConnect and DuraConnect II is a flexible aluminum connector system. Can not to be enclosed and cannot penetrate through walls, floors, or ceilings. Twist-lock connectors on each end for fast, easy professional installations.|Can be used when type B gas vent double wall connector is required|Not to be enclosed and cannot penetrate through walls, floors and ceilings|Twist lock connectors on each end|1 in. clearance to combustibles