we engaged in cartridge tester and converter over 7 years in china .received good reputation from our customers from all over the world .Tester: Helping the recycling enterprises to apart good cartridges from bad ones, which would reduce the loss. (Tester for Hp 27,28,56,57,58,59, 816£¬817/Canon40 41,50 51,..... /Lexmark 17G 0050, 17G 0060, 17A 1970, 17A 1980,¡.)
Converter: Upgrading cartridge to another higher value cartridge (for example convert Hp56 to Hp21), which increases your cartridge value.
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