Fernco® Flexible Repair Coupling, Strong Back, Series: 1056 RC, Fitting/Connector Type: Coupling, 4 x 3 in Nominal Size, Cast Iron/Copper/Lead/Plastic/Steel, 4.02 in Length, 4.3 psi Tested, Flexible PVC, -30 to 140 deg F, 4.58 in ID x 5.22 in OD
Designed for resistance to heavy earth loads and shear forces, while providing improved pipe alignment.