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 (100, 110) 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 (100, 110) or away from the at least one developer member (100, 110); wherein said conveying assembly comprises: at least one supply conveying member (310, 320, 330, 340, 350) 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 (310, 320, 330, 340, 350) 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 (100, 110) to the outlet. a housing having an inlet and an outlet for connection to a mixing and filling module; at least one developer member (100, 110) 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 (100, 110) or away from the at least one developer member (100, 110); wherein said conveying assembly comprises: at least one supply conveying member (310, 320, 330, 340, 350) 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 (310, 320, 330, 340, 350) 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 (100, 110) to the outlet. at least one supply conveying member (310, 320, 330, 340, 350) 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 (310, 320, 330, 340, 350) 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 (100, 110) to the outlet.