The Invisible Hinge Model 218 by Soss is designed for 1-3/4" thick material and offers a 20 minute fire rating. Made of zinc, this black hinge comes with a paper template, screws, and instructions for easy installation. With a mortise mounting type and a #10 X 1-1/2" size, this hinge provides a secure and stylish option for your doors. The package includes one hinge and weighs 2.07 pounds, making it a reliable choice for your home or office.