Fernco 6"x4" Flexible Reducing Coupling is designed to connect cast iron or plastic pipes to cast iron or plastic pipes. With a maximum working pressure of 4.3 psi and a maximum working temperature of 120°F, this coupling ensures reliable performance. It is corrosion resistant, flexible, Lead-Free, removable, UV resistant, underground rated, and suitable for underground use. Comes with 2 stainless steel clamps.