Review on 🖨️ Cartlee Compatible High Yield Laser Toner Cartridges for Xerox Phaser 6510/DNI 6510/DN 6510/N, Workcentre 6515/DNI 6515/DN 6515/N Printer (2 Black, 1 Cyan, 1 Magenta, 1 Yellow) by Alan Brewer

Immediately after receipt, I received an e-mail that there were firmware problems with some cartridges. I have them handy when I need them, I don't want to open them all up and test them all to make sure they work and then hope they still work when I really need them. sent back. You should test your own stuff before shipping, don't send stuff you know had problems and tell me about it afterwards. Not cool.