A syringe for a single metering of a filler material, comprising a supply chamber (5, 6, 7) for receiving the filler material (8, 9, 15), wherein the supply chamber (5, 6, 7) has a discharge end for dispensing the filler material (8, 9, 15) and a conveying end which is disposed opposite the discharge end, wherein the supply chamber (5, 6, 7) includes a closable discharge element so that the filler material (8, 9, 15) is storable in the supply chamber (5, 6, 7), wherein the supply chamber (5, 6, 7) includes a first part chamber which includes a first flowable component and a second part chamber which includes a second flowable component, and wherein the supply chamber (5, 6, 7) is surrounded by a housing; a mixer and a mixer housing which are attached to the discharge end, wherein the mixer housing forms the closable discharge element, and wherein the mixer is formed in one piece with the housing which includes the first and second part chambers (6, 7) and the mixer housing is connected to the housing; and a docking element for connecting the supply chamber (5, 6, 7) to a cartridge for filling the supply chamber (5, 6, 7) with the filler material (8, 9, 15), wherein the docking element includes a first inlet end for connecting the first part chamber to the cartridge and a second inlet end for connecting the second part chamber to the cartridge, wherein the first inlet end is configured as a first tubular stub and the second inlet end is configured as a second tubular stub which is intended for the connection to the cartridge, wherein the docking element has a projection which connects the first and second part chambers (6, 7) to one another, wherein the first tubular stub includes a first passage and the second tubular stub includes a second passage, and wherein the first passage is connected to the first part chamber and the second passage is connected to the second part chamber, wherein the syringe has an expulsion element (3, 4, 30) receivable in the supply chamber (5, 6, 7) to dispense the filler material from the supply chamber (5, 6, 7); wherein the expulsion element comprises at least one first piston and a second piston, with the first piston being movably receivable in the first part chamber and the second piston being movably receivable in the second part chamber so that, on the movement of at least one of the first or second pistons (3, 4), the first and second flowable components (8, 9) can be dispensed simultaneously; and wherein a plunger is provided, with the first and second pistons (3, 4) being movable by means of the plunger and the plunger being formed in one piece with the first piston and with the second piston. a supply chamber (5, 6, 7) for receiving the filler material (8, 9, 15), wherein the supply chamber (5, 6, 7) has a discharge end for dispensing the filler material (8, 9, 15) and a conveying end which is disposed opposite the discharge end, wherein the supply chamber (5, 6, 7) includes a closable discharge element so that the filler material (8, 9, 15) is storable in the supply chamber (5, 6, 7), wherein the supply chamber (5, 6, 7) includes a first part chamber which includes a first flowable component and a second part chamber which includes a second flowable component, and wherein the supply chamber (5, 6, 7) is surrounded by a housing; a mixer and a mixer housing which are attached to the discharge end, wherein the mixer housing forms the closable discharge element, and wherein the mixer is formed in one piece with the housing which includes the first and second part chambers (6, 7) and the mixer housing is connected to the housing; and a docking element for connecting the supply chamber (5, 6, 7) to a cartridge for filling the supply chamber (5, 6, 7) with the filler material (8, 9, 15), wherein the docking element includes a first inlet end for connecting the first part chamber to the cartridge and a second inlet end for connecting the second part chamber to the cartridge, wherein the first inlet end is configured as a first tubular stub and the second inlet end is configured as a second tubular stub which is intended for the connection to the cartridge, wherein the docking element has a projection which connects the first and second part chambers (6, 7) to one another, wherein the first tubular stub includes a first passage and the second tubular stub includes a second passage, and wherein the first passage is connected to the first part chamber and the second passage is connected to the second part chamber, wherein the syringe has an expulsion element (3, 4, 30) receivable in the supply chamber (5, 6, 7) to dispense the filler material from the supply chamber (5, 6, 7); wherein the expulsion element comprises at least one first piston and a second piston, with the first piston being movably receivable in the first part chamber and the second piston being movably receivable in the second part chamber so that, on the movement of at least one of the first or second pistons (3, 4), the first and second flowable components (8, 9) can be dispensed simultaneously; and wherein a plunger is provided, with the first and second pistons (3, 4) being movable by means of the plunger and the plunger being formed in one piece with the first piston and with the second piston.