2" Outside Air Kit For Pellet Stoves. 2" X 60" Flex Pipe With Wall Plate Screen. Dura Vent Item Number 3PVP-AIK Diameter: 2" Clearances: 1 clearance to combustibles in the USA for appliances using wood pellets or oil. 1 clearance Listings: c-UL-us Listed to UL 641 (MH8381 and MH14420). ULC Listed to ULC S609, ULC/ORD C441 (CMH1439 Kit includes: faceplate with screen, moisture barrier, aluminum flex, and two clamps. Package Quantity: 1