Description Freightliner Receiver Drier Replaces OEM: A22-63993-000 Diameter: 4″ Overall Length: 6 3/4″ Inlet: #8 Slimline Outlet: #8 Slimline Reference Numbers A22-63993-000, 7561, 825-4752, 800-1220, A22-65550-000, 37-14013, PTAC7561, 74R4216