Impeller Compatible with Manufacturer Model Number 2ZWP9A 2ZWR1B 2ZWX8 Compatible with Grainger Part Number 2ZWP9 2ZWR1 2ZWX8 Impeller Design Semi-Open Impeller Diameter 4 9/16 in Impeller Material Cast Iron Compatible with Pump Type Straight Centrifugal Pumps Compatible with Brand Dayton