1056-1818 - Cast Iron / Lead / Plastic / Steel to Cast Iron / Lead / Plastic / Steel Flexible Coupling - 18"Elastomeric Polyvinyl Chloride Flexible Coupling, For Pipe Size 18 in x 18 in, 18 3 4 in x 18 3 4 in Fernco Couplings have earned a reputation for consistent, superior performance, giving you full confidence in their quality and reliability. The dimensional flexibility of Fernco couplings ensures leak proof pipe seals on virtually any pipe material: plastic, cast iron, asbestos cement, clay, concrete, steel, copper and ductile iron. All flexible