Proflex is a shielded transition pipe coupling that allows you to make pipe connections that are resistant to shear forces, while creating a rigid, long-lasting pipe joint. From 1-1/2 to 8 in pipe diameters - Proflex connects cast iron, plastic, steel, copper and tubular, drain waste and vent systems for above-ground applications. Fernco® PROFLEX® Pipe Coupling, Shielded, Series: 3005, Fitting/Connector Type: Coupling, 4 in Nominal, Plastic/Steel/XH Cast Iron, 2.13 in Length, -30 to 180 deg F, 4.44 x 4.5 in, Domestic