National 4 In. Oil Rubbed Bronze 1/4 In. Radius Spring Door Hinge Solid Rod waste and vent purposes only

waste and vent purposes only

Equipped with a high-limit safety switch

-Made from high quality Grade A steel for supporting extreme durability

electrochemical carbon monoxide sensor

7x7 Galvanized Cable

National 4 In. Oil Rubbed Bronze 1/4 In. Radius Spring Door Hinge Solid Rod waste and vent purposes onlyCatalog 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.