Externally they are slightly different from the original OEM toner cartridges. However, they fit well into the printer and are recognized by it. I don't notice any color difference between the same OEM print image and these images. So I would recommend them as the best value for money as the price difference is significant.
MFP inkjet HP Ink Tank 315, color, A4, black
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TEINO Remanufactured Ink Cartridge Replacement for Canon 245XL 246XL PG-245XL CL-246XL PG-243 - Compatible with Canon PIXMA MG2520 MG2920 MG2922 MG2420 MG2522 TS3120 MG3022 MX490 MX492 (1 Black, 1 Tri-Color)
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Cool Toner 055H Compatible Toner Cartridge Replacement for Canon: High-Quality Ink for Your Printer (Black Cyan Magenta Yellow, with Chip, 4-Pack)
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HP LaserJet 1102/1130/1132/1210 Compatible Cartridge Cactus CS-CE285AS
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