Fernco® Repair Coupling, Strong Back, Series 5056 RC, Fitting/Connector Type: Coupling, 4 in Nominal Size, Cast Iron/Plastic/Steel to Cast Iron/Plastic/Steel, 4.02 in Length, 4.3 psi, Flexible PVC, -30 to 140 deg F, Domestic
Designed for resistance to heavy earth loads and shear forces, while providing improved pipe alignment.