SOSS 218 Heavy-Duty Invisible Hinge, 1-3/4" Minimum Door Thickness, 4-5/8" Height, 20-Minute Fire-Rated, 1ea. Per Box SOSS® Invisible Hinge model #218 is for use in wood or metal applications that are 1-3/4″ to 2″ thick. The model #218 is made of zinc and steel materials. Nylon links add strength and durability. This full size door style hinge will provide superior appearance and durability. Our Hinges are found in many applications where flush fit, compact size and smooth operation are necessary features. SOSS® Invisible Hinges open a full 180° and are a single action hinge. The Underwriters Laboratories labeled the model #218 SOSS® Invisible Hinge can be used on hollow metal , sheet metal, tin clad, steel composite or wood core swinging type fire doors and frames with a 20 minute rating. For fire rated doors: Use at least one fire-rated hinge for every 20″ of door height or portion thereof, or one hinge for every 60 lbs. or fraction thereof, whichever calculation demand more hinges. Application: Full Sized Entry, Metal, Wood Min. Material Thickness: 1-3/4″ Fire Rating: 20 Minutes Screws Included: Wood and Machine Packaging: 1 / Box = 1 Each Price: Per Each
