The FS-3750A uses TK-20H black toner, while MK-24 is the printer's maintenance kit. One keeps the printer supplied with toner; the other is for a separate maintenance need.
Toner Buzz carries genuine Kyocera TK-20H and MK-24 for this model. Choose the toner when that is the item you need, and use the MK-24 code only for the corresponding maintenance work.
Guaranteed fit for Kyocera FS-3750A
The products below are genuine OEM Kyocera Supplies made for the Kyocera FS-3750A.