What replacement ink bottles are compatible with the HP Smart Tank 520?
Compatible replacement ink bottles include the HP GT53 90-ml Black Original Ink Bottle and HP GT52 bottles in Cyan, Magenta, and Yellow individually, or as an HP GT52 3-pack Cyan/Magenta/Yellow. These part numbers apply to the Latin America region; for fill and yield details, visit http://www.hp.com/go/learnaboutsupplies. (Page 2)
From the official HP Smart Tank 520 All-in-One manual, page 2
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