The rotor vane with OEM no.344101540 is a genuine Metabo replacement part for the following models of Metabo air-powered grinder:
Metabo Corded Air Die Grinder 125mm 01556000 DW 125
Metabo Corded Air Die Grinder 125mm 01557000 DW 125 QUICK
Metabo 01591000 Dw 10-125 Quick Pneumatic Tools