A flange gasket is used to fit or join between two sections of pipe. The types of gaskets are a ring gasket; a gasket with an outer diameter (OD), and an inner diameter (ID). A full face flange gasket is a gasket with no inner diameter (ID) and has bolt holes aligned in a bolt circle. The common types of gaskets Morrill Industries, Inc. offers are Neoprene, EPDM, Buna-N, Silicones, SBR (Red Rubber), Viton, Teflon®, and Non Asbestos.