HP LaserJet printers that use the HP 26A toner also use the HP 26X toner. The HP 26X compatible will fit in your printer just like the HP 26A standard toner cartridge. Printers that use the HP 26A and HP 26X cartridges are the HP LaserJet Pro M402d, M402dn, M402dne, M402dw, M402n, MFP M426dw, MFP M426fdn, and the MFP M426fdw printers.