TOHITA Magnetic Roller C4127A C4127X Q6511A Q6511X Compatible with HP LaserJet 4000, 4050 printers.

Magnetic roller (also called mag roller / developer roller) is the key spare part inside the toner cartridge. It controls even toner layer distribution and transfers toner to the OPC drum directly, which decides print density and image stability. Our TOHITA magnetic roller adopts premium conductive coating, good wear resistance and stable magnetic property.

• Perfect replacement for C4127A C4127X Q6511A Q6511X toner cartridges

• Consistent toner delivery, avoid light print, uneven density and background grey fog

• Smooth surface coating, long service life for cartridge refilling & rebuilding

• Strict inspection before shipment, reliable for bulk remanufacturing

• Ideal for toner rebuild shops, printer repair technicians and wholesale distributors

If your prints become faded, faint or have inconsistent black density, replacing this magnetic roller is a cost-effective repair solution for your HP LaserJet 4000 / 4050 cartridges.