Impeller, Compatible with Brand Armstrong, Compatible with Grainger Part Number 788V77, 788VA6, Compatible with Manufacturer Model Number 106284MF-742, 106284MF-743, Compatible with Series 1050-2, S-55, Compatible with Series Family 1050, 1060, S&H, Impeller Material Plastic, Overall Diameter 4.75 in, Compatible with Pump Type In-Line Circulating Pumps, Includes Gasket, Seal Kit, Manufacturers Warranty Length 1 yr