The Plumber's Choice Shielded 3 in. Cast Iron Transition Coupling Connects to Copper H-38555 - The Home Depot
The Plumber's Choice Shielded 1-1/2 in. Transition Coupling Connects Cast Iron, Plastic, or Steel to 1-1/2 in. Copper or 1-1/4 in. Plastic H-38337 - The Home Depot
plumbing - How can I replace this cast iron tee without increasing the width of the connecting pipes? - Home Improvement Stack Exchange
Fernco 3007-33, 3" x 3" ProFlex Coupling - SupplyHouse.com
Replacing Copper/Cast Iron Drain Connection with PVC | DIY Home Improvement Forum
Material Number E041000, DWV No Hub Soil Pipe Adapter C x No Hub - Cast, 805-N On NIBCO
67mm x 2 1/2" Copper-Press Male Iron Adapter | Copper Press Fittings | Brymec