Circulating Pump Coupler, Compatible with Brand Armstrong, Bell and Gossett, Compatible with Grainger Part Number 52CE14, 52CE15, 52CE16, 52CE17, Compatible with Manufacturer Model Number 174031MF-013, 174031MF-043, 174033MF-013, 174033MF-043, 174034MF-013, 174034MF-043, Compatible with Series H-32, H-41, S-25, S-35, Compatible with Series Family S&H, Coupling Material Cast Iron, Compatible with Pump Type In-Line Circulating Pumps