CL-541/5227B005AA: 4ml (12ml Total)
CL-541XL/5226B005AA: 7ml (21ml Total)
The fill holes of these cartridges are very small and you will have trouble getting a regular syringe to fit. I recommend using the tool provided with many refill kits, a 2mm drill bit or a square shafted awl to widen it.
We recommend sticking to the lower fill for the CL-541 as these cartridges have a smaller sponge and are physically restricted inside the cartridge. As such over filling them can result in ink spilling inside your printer.
Once this cartridge has been refilled your printer will retain the same ink level estimate it has previously. These cartridges have no way of knowing that they now contain fresh ink and only estimate ink levels based upon how much printing had been done previously. Eventually your printer will believe that the cartridge is completely empty and prevent you from printing until a small prompt has been given. More information on this topic can be found here.
This guide is intended purely to show where to inject the ink into these cartridges and how much we recommend using. For full refill instructions for these cartridges please click here.
These cartridges fit a variety of Canon printers including:
Canon Pixma MG2150
Canon Pixma MG2250
Canon Pixma MG3150
Canon Pixma MG3250
Canon Pixma MG4150
Canon Pixma MG4250
Canon Pixma MX375
Canon Pixma MX395
Canon Pixma MX435
Canon Pixma MX455
Canon Pixma MX515
Canon Pixma MX525