1002-44RC - Fernco 1002-44RC - 4" x 4" Strong Back PVC Shielded Coupling (Clay to Cast Iron, PVC, Steel, Lead)
The Plumber's Choice 6 in. Clay x 4 in. Cast Iron PVC Flexible Coupling with Stainless Steel Clamps E86844X6 - The Home Depot
Fernco 1056-42 4" x 2" Flexible PVC Reducer Pipe Coupling Cast Iron Plastic | eBay
6" x 4" PVC to PVC / Cast Iron EPDM to Cast Iron EPDM Flex Reducer Coupling
Rubber Coupling PVC to Cast Iron (or Cast Iron to PVC) 4" | AF Supply
Fernco 4 in. Service Weight Cast Iron Hub x 4 in. Sch. 40 PVC Compression Coupling P44U-405 - The Home Depot
Disconnecting a lead & oakum seal on a cast iron drain pipe | Jay's Technical Talk
Rubber Coupling PVC to Cast Iron (or Cast Iron to PVC) 1 1/2" x 1 1/4" | AF Supply
Fernco 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 - Hydraulic Couplings - Amazon.com
Charlotte Pipe 4 in. x 4 in. PVC DWV Cast Iron Hub x Spigot Adapter PVC 00123 1000HD - The Home Depot