80/90 6-3-4 B Vent Flex FS Kit1FNS 80/90 Combo Cap;1 Bvent Firestop: 1 PolyPro pipe to FNS Flex Adapter

80/90 6-3-4 B Vent Flex FS Kit1FNS 80/90 Combo Cap;1 Bvent Firestop: 1 PolyPro pipe to FNS Flex Adapter