This is our Viton rubber sediment bowl gasket. This gasket is used in many John Deere models except Dubuque built. Our gasket utilizes a correct Viton rubber for today's ethanol fuels. It has the added advantage of remaining pliable without "memory" so that it can be re-used. Far superior to cork and the cork blends which utilize BunaN rubber. This gasket is standard in our automatic fuel and manual fuel shut-off kits.