Circulating Pump Coupler, Compatible with Brand Bell and Gossett, Compatible with Grainger Part Number 4RD13, 4RD14, 5YN64, 5YN65, 5YN66, 5YN67, 5YN68, 5YN69, 5YN70, 5YN71, 5YN72, Compatible with Manufacturer Model Number 105089, 105097, 604S, 608S, 608T, 611T, 613S, B604S, B611S, Compatible with Series E-60, 60, Compatible with Series Family E-60, 60, Coupling Material Cast Iron, Compatible with Pump Type In-Line Circulating Pumps, Manufacturers Warranty Length 1 yr.