Proflex 3" x 3" PVC Shielded Transition Coupling provides a reliable connection between cast-iron pipe and plastic, steel, or extra-heavy cast iron pipe without the need for bushings. Designed for ease of installation, it features an internal pipe stop that ensures proper placement while reducing noise and vibration. The outer shear ring and clamp assemblies meet the standards of ASTM A167-91, ing durability and performance in various applications. Model Number: