A developing unit configured for operating with a two-component developer material comprising carrier particles to which the toner particles are adhered; said developing unit comprising: a housing having an inlet and an outlet for connection to a mixing and filling module ; at least one developer member rotatably mounted in said housing and configured for transferring toner particles to a photoconductor member ; a conveying assembly configured for conveying toner particles to the at least one developer member or away from the at least one developer member ; wherein said conveying assembly comprises: at least one supply conveying member rotatably mounted in said housing and configured for conveying toner particles from the inlet to the at least one developer member; said at least one supply conveying member comprising an auger , wherein said auger comprises a bar shaped shaft , a helical screw blade arranged around said shaft, and at least a first elongate element arranged at a distance of said shaft; wherein the at least one supply conveying member comprises a first auger located parallel to and above the auger with the first elongate element, said first auger being arranged to receive toner particles from the inlet ; a discharge conveying member rotatably mounted in said housing and configured for conveying toner particles from the at least one developer member to the outlet . a housing having an inlet and an outlet for connection to a mixing and filling module ; at least one developer member rotatably mounted in said housing and configured for transferring toner particles to a photoconductor member ; a conveying assembly configured for conveying toner particles to the at least one developer member or away from the at least one developer member ; wherein said conveying assembly comprises: at least one supply conveying member rotatably mounted in said housing and configured for conveying toner particles from the inlet to the at least one developer member; said at least one supply conveying member comprising an auger , wherein said auger comprises a bar shaped shaft , a helical screw blade arranged around said shaft, and at least a first elongate element arranged at a distance of said shaft; wherein the at least one supply conveying member comprises a first auger located parallel to and above the auger with the first elongate element, said first auger being arranged to receive toner particles from the inlet ; a discharge conveying member rotatably mounted in said housing and configured for conveying toner particles from the at least one developer member to the outlet . at least one supply conveying member rotatably mounted in said housing and configured for conveying toner particles from the inlet to the at least one developer member; said at least one supply conveying member comprising an auger , wherein said auger comprises a bar shaped shaft , a helical screw blade arranged around said shaft, and at least a first elongate element arranged at a distance of said shaft; wherein the at least one supply conveying member comprises a first auger located parallel to and above the auger with the first elongate element, said first auger being arranged to receive toner particles from the inlet ; a discharge conveying member rotatably mounted in said housing and configured for conveying toner particles from the at least one developer member to the outlet . <EOS>