Get this Master Flow 4 in. Round Tee for delivery. Galvanized-steel construction. Sturdy, metal tee is ideal for venting bath and kitchen fans as well as heating and air-conditioning applications. Branches a main line or branch line with a tapered, 90° angle. Installs with sheet-metal screws. Add a reducer after the branch to help ensure proper air velocity. Insulate ductwork for system efficiency and comfort. Seal seams with code-approved mastic, sealant or duct tape (not included).

Get this Master Flow 4 in. Round Tee for delivery. Galvanized-steel construction. Sturdy, metal tee is ideal for venting bath and kitchen fans as well as heating and air-conditioning applications. Branches a main line or branch line with a tapered, 90° angle. Installs with sheet-metal screws. Add a reducer after the branch to help ensure proper air velocity. Insulate ductwork for system efficiency and comfort. Seal seams with code-approved mastic, sealant or duct tape (not included).