Speedy Inks - Compatible Set of 4PK Konica-Minolta Laser Toner Cartridge 1 of each 8938-629 8938-630 8938-631 8938-632 Set includes - 1 of each 8938-629, 8938-630, 8938-631, & 8938-632 Page Yield Black - 15,000 Shelf Life - 24-36 MonthsPage Yield Color - 12,000 Shelf Life - 24-36 Months Black Cost Per Page - .30 centsColor Cost Per Page - .41 cents For use in: Konica-Minolta MagiColor 7450, MagiColor 7450 II grafx, MagiColor 7500 & MagiColor 7550 The use of aftermarket replacement cartridges and supplies does not void your printer's warranty