Whirlpool 4396008RP Vent Clamps, 2-Pack
Builder's Best 012635 Roof Vent Cap, Black Galvanized Metal, with 4-inch diameter collar
Fantech 9800000 RSK-4 Backdraft Damper, 4" Duct
Fantech PB110 Inline Exhaust Bath Fan Kit, 110 CFM, Remote mount fan, for 4" duct
Ideal-Air 736185 Wye Branch, 4 x 4 x 4"
Fantech CG 4 Contour Grille with Collar for 4" Duct
Lambro 244 4-Inch Aluminum Duct Connector
Fantech DG 4 Designer Exhaust Grille with Collar for 4" Duct
Roof Vent Cap Duct Collar
Active Air Stainless Steel Duct Clamps, 4" (Pack of 2)