Duravent 4" X 6-5/8" Directvent Pro 3" X 4" Co-linear Flex Kit W/ Prairie Cap

Use when installing a direct vent co-linear insert into a masonry chimney.

Kit includes: Choice of High-Wind Termination Cap or Prairie Termination Cap; and two pieces of Aluminum Flex lengths - one Red (exhaust), and one Green (air intake). See chart for diameters and lengths.