Circulating Pump Coupler, Compatible with Brand Bell and Gossett, Compatible with Grainger Part Number 4RC91, 4RC92, 4RC93, 4RC94, 4RC95, 4RC96, 4RD16, 4RD17, Compatible with Manufacturer Model Number 102206, 102210, 102214, 106189, 2 In. BNFI, HV BNFI, PR AB, SERIES 100 BNFI, Compatible with Series 100 NFI, Compatible with Series Family 100 NFI, Coupling Material Cast Iron, Compatible with Pump Type In-Line Circulating Pumps, Manufacturers Warranty Length 1 yr.