Fernco 1-1/2" Cast Iron/Plastic/Steel x 1-1/2" Copper or 1-1/4" Plastic Proflex Flexible Coupling at Menards®
Fernco 3 in. x 1-1/2 in. DWV Flexible PVC Coupling P1056-315 - The Home Depot
1-1/2 Inch Fernco 1056-150 Flexible Coupling
Fernco 2-Pack 1056-150/125 Reducing 1-1/2-in. x 1-1/4-in. Flexible PVC Pipe Coupling for Cast Iron and Plastic Plumbing Connections in Black - GreyDock.com
1056-250/22 - Fernco 1056-250/22 - 2-1/2" x 2" Flexible Coupling (Connects Cast Iron, PVC, Steel or Lead)
Fernco 1056-42 Reducing 4-in. x 2-in. Flexible PVC Pipe Coupling for Cast Iron and Plastic Plumbing Connections in Black - Walmart.com
Fernco 4 In. x 2 In. Flexible PVC Coupling - Parker's Building Supply