Fernco® Flexible Repair Coupling, Strong Back, 1006 RC Series, Fitting/Connector Type: Coupling, 6 x 4 in Nominal Size, Concrete x Cast Iron/Plastic, 5.94 in Length, 4.3 psi Tested, Flexible PVC, -30 to 140 deg F, 7.58 in ID x 8.31 in OD
Designed for resistance to heavy earth loads and shear forces, while providing improved pipe alignment.