Fantech FEL4 Plastic 90 deg. Elbow For 2x4 Stud Walls fits 4" Duct Work
Heavy-duty plastic 90o mounting
collar/elbow for use in 2 x 4 stud walls. Use with 4-inch duct. With half-inch
drywall lip already set, just nailin place and connect duct. Low depth profile
makes this elbow the perfect solution for sidewall ventilation within a wall
information in inches.
Fantech Accessories Book - PDF
Fantech FEL4 4" Plastic 90
deg. Elbow For 2x4 Stud Walls fits 4"