National 4 In. Satin Nickel 1/4 In. Radius Spring Door Hinge grill cover Precision balanced fan blades for

Precision balanced fan blades for minimum vibration and no heat distortion

while the powder-coated finish will retain its appearance for many years

Closure strips and silicone sealant and nails or screws with neoprene washers required

The panels are classified as low-emitting

National 4 In. Satin Nickel 1/4 In. Radius Spring Door Hinge grill cover Precision balanced fan blades forCatalog model No. V521 series. Cold rolled steel. Designed for hanging self closing doors in basements, stairways, garages, and entrances. Can be used in residential, commercial, and apartment buildings. Hinge is UL approved for fire doors. Closing speed is adjustable. Fits standard hinge cutout. 1 4" radius, round corner automatic door closing spring hinge.