Here are the compatible ink refills we offer for the HP 44 Magenta (51644M) inkjet cartridge:
Magenta - DuraFIRM Bulk printer ink - 60ml - 2oz
$3.95
Injector Kit for Inkjet Cartridge Refills
$2.65
Inkjet Cartridge and Printhead Cleaner - 60ml - 2oz
$2.75