SOSS 218ICUNP Model 218IC Unplated  Invisible Closer Hinge

SOSS® Invisible Hinge model #218IC is ideally suited for most types of doors that are 1-3/4" (44mm) thick. The model #218IC is made of zinc and steel materials. Nylon links provide added strength and durability. The SOSS Invisible Closer gives you a door closer that is totally invisible from either side when the door is closed. The closure rate is completely adjustable with an allen wrench after installation, and does not require removal of the closer. Installation can be either inside the door itself or inside the door jamb. SOSS® Invisible Hinges open a full 180° and are a single action hinge.
The Underwriters Laboratories labeled the model #218IC 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.
Allow one closer for every 55 lbs of door weight or portion thereof. Fire rated doors also require one fire rated hinge for every 20″ of door height or fraction thereof. The calculation that requires more hinges is the total number of hinges required.
Recommended spacing for use of one closer is half the distance from the center line of the door to the center line of the top hinge. Please reference the hinge spacing drawing.
Finish: Unplated
Application: Full Sized Entry, Metal, Wood
Minimum Thickness: 1-3/4" (44mm)
Opening Angle: 180°
Fire Rating: 20 Minutes
Screw: Wood and Machine
Wood Screw Size: #10 x 1-1/2"
Spring Closer: 218IC