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