RUBBER FERNCO COUPLING CLAY X PVC 6" X 4" #1002-64
Buy a 6 Inch Clay to 4 Inch Plastic Adaptor at EasyMerchant
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EVERCONNECT 4868 Flexible Coupling 4 Cast Iron/PVC x Clay 6" Black with Stainless Steel Clamps, 4" x 6" : Amazon.co.uk: DIY & Tools
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Fernco Inc. P1002-64 6-Inch Clay to 4-Inch Cast Iron Or Plastic Coupling
Flexseal Adaptor 6" Clay to 4" PVC 187 - 111
Fernco 4 in. Clay x 6 in. DWV Flexible PVC Coupling P1002-46 - The Home Depot
Fernco 6-in. x 4-in. Flexible PVC Coupling for Sewer, Drain, Waste and Vent Piping - Strong, Resilient, and Rustproof in the PVC Pipe & Fittings department at Lowes.com