Grundfos 98394441, Impeller Coupling, for use with Model CR 10-1, CR 10-2, CR 10-3, CR 10-4, CR 10-5, CR 10-6, CR 10-7, CR 10-8, CR 10-9, CR 10-10, CR 10-12, CR 10-14, CR 10-16, CR 10-17, CRE 10-1, CRE 10-2, CRE 10-4, CRE 10-6, CRE 10-8, CRE 10-10, CRE 10