101-002-12 is a part of Triridge, a three-piece cornice system used for exterior window and door applications. The part is a factory-manufactured roof flange consisting of a solid outer and inner flange with a flexible composite core in between. This roof flange is designed to expand and contract along with the door or window frame to prevent water penetration. The easy to install and versatile design of this roof flange can be used for a variety of exterior applications.