Original Konica Minolta TN321K Black Toner Cartridge (A33K150). Refresh Cartridges is a trading name of Refresh eCommerce Ltd; a company that started life in 1999. Within the first few years of business we shifted our focus to computer consumables where it continues to this day, continuing to offer low cost, high quality products with fast dispatch times and a no quibble guarantee. We currently have three stores and a warehouse in sunny Devon in the South West of England. This Original Konica Minolta TN321C Cyan Toner Cartridge (A33K450) is compatible with a range of Printers listed above.