This Fresh Air Intake Kit from the PelletVent Pro series is a Type L Biofuel Chimney Pipe component and consists of the duralock system for a tight seal. Allows fresh air into an existing pellet stove installation that had been using inside air. Allows an installer to decide the best possible location for the air intake vent, not the same location as the wall thimble. The 2" diameter, 18" length flex hose expands to approximately 60". Includes: faceplate with screen, moisture barrier, aluminum flex, and two clamps. Features: Type: Air Intake Kit. Material: Aluminum. Collection: PelletVent Pro. Type L Biofuel Chimney Pipe Component. Designed for use with 3" Pellet Vent Appliances.