Harrington 154-700060 6" Commercial Neoprene Flange Gasket - This flange gasket is designed to seal spaces between two sections of pipe. It also prevents leaks from a mating surface and contours to the shape of the pipe in order to prevent any leaks. It has a unique ring design for optimum sealing with less torque required than with flat-faced gaskets. Ideal for thermoplastic piping systems.