The Epson C13S051204 photoconductor unit does the majority of the black toner distribution for the toner cartridge available separately. This genuine Epson S051204 offers you the very greatest print quality for your AcuLaser CX37DN.When the print quality produced by your old Epson C13S051204 begins to deteriorate, look no further than this original photoconductor unit. Installing a brand new Epson S051204 photoconductor instantly brings the prints of your printer back up to Epson standards.