HP LaserJet 4250, 4350 series laser printers - Security MICR Toner Cartridge for printing CHECKS, Standard Yield Version (approx 10,000 check yield). This MICR toner creates a bright red stain if text alteration is attempted.

HP LaserJet 4250,4350 series laser printers - Security MICR Toner Cartridge for printing CHECKS High Yield Version (20,000 page yield). This MICR toner creates a bright red stain if text alteration is attempted.

HP LaserJet 4240, 4250, 4350 series laser printers - Black Toner Cartridge made by Xerox (same as: HP# Q5942A) (approx. 10,000 page/yield)

HP LaserJet 4250, LaserJet 4350 series monochrome laser printers - Black Toner Cartridge made by Xerox (same as HP # Q5942X) (approx. 22,000 page yield)