The PUSH & SHUV Metal Ring gasketed closet flange from Dallas Specialty connects to cast iron, PVC, ABS and lead. The flange is a flush type that fits flat on any floor. Just lubricate the gasket if needed, then push the flange into the pipe, and fasten it to the floor. It is a full opening flange with no obstructions like screws. The gasket is made of high-quality flexible PVC material that will never dry rot, and the metal ring will never corrode.