National 4 In. 1/4 In. Radius Brass Spring Door Hinge Oakmont these sensors replace defective or

these sensors replace defective or damaged sensors for every Chamberlain Garage Door Opener manufactured after 1997

Single locking sections are sold individually

• Made of durable stainless steel

• 2-year warranty

small commercial

National 4 In. 1/4 In. Radius Brass Spring Door Hinge Oakmont these sensors replace defective orCatalog 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.