Cast Iron Flange, Pipe Size (In.) 3/4, For Pump Number 4JA83, 4JA84, 4RD04, 4RD16, 4RC91, 2P310, 2P410, 5P427, 4P975, 4YM17, All Taco Cast-Iron Pumps except No. 4PC80, Material Cast Iron, Fits Pump Cast-Iron In-Line, Package Quantity 2