DuraVent DuraVent 4" x 6-5/8" DirectVent Pro Direct Vent Pipe - Double Wall - Co-Linear Masonry Chimney Conversion Kit with Flex Pipe and Prairie Cap

4" x 6-5/8" DirectVent Pro Co-Linear Direct Vent Masonry Chimney Conversion Kit with 3" x 30' Flex and Prairie Cap StyleUse when installing a direct vent co-linear insert into a masonry chimney. Kit includes: Prairie Termination Cap, and two pieces of Aluminum Flex lengths - one Red (exhaust), and one Green (air intake). See chart for diameters and lengths.DirectVent Pro features tight inner connections for superb performance, with no gaskets or sealants required (unless specified by the appliance manufa...