Selkirk 3" to 8" Flex Coupler (Flexi-Liner) w18.1 15 lb needed for 7"

15 lb needed for 7" x 37" burner insert

4 Sided Trim (TRD-26-4)

7" x 20" / 40 × 40 × 50

94" Height/Length 1" Width 17

Selkirk 3" to 8" Flex Coupler (Flexi-Liner) w18.1 15 lb needed for 7"Selkirk 3" to 8" Flex Coupler Fitting for joining Flexi Liner Lengths. Aluminum Flexible Liner Flexi Liner system is designed for relining existing masonry or listed factory built chimneys and vents serving Category I for natural gas or propane fired appliances. 3" to 8" Diameters: 3000 series aluminum, 2 ply Maximum flue gas temperature 470F 3" 8" diameter kits available in 25' and 35' lengths 3" 5" diameter kits available in 15' lengths Extension