Fantech FEL4 4 Low Profile Plastic Elbow

Fantech Elbow, FEL 4 4″ For a 4-inch duct. Heavy-duty plastic 90 mounting collar/elbow for use in 24 stud walls. With half-inch drywall lip already set, just nail in place and connect duct. Low depth profile makes this elbow the perfect solution for sidewall ventilation within a wall partition.