The Grainger 1" Flange Gaskets are made of non-asbestos fiber material with nitrile binder rated to handle temperatures up to 650°F. They feature small I.D. and standard O.D. dimensions and are designed for use with ANSI Class 150 and 300 flanges. These gaskets provide excellent chemical resistance and come in a variety of materials like aramid fiber, flexible graphite, and mica to suit different application needs. With proper installation and maintenance, these gaskets offer reliable sealing performance. The Grainger brand ensures durable construction and quality manufacturing.