Transfer rolls and belts carry toner from a laser printer's drum to the page: belt units and transfer rollers that are among the highest-mileage wear parts in a color laser printer, replaced on their own maintenance schedule separate from toner cartridges. When color output starts streaking or banding after a toner swap does not fix it, this part is usually why.
These are printer-model-specific parts - order by the exact printer model, since belt and roller units do not cross even between similar models in the same product line. High-volume and color-heavy printers wear transfer components faster than their toner-yield numbers suggest, so track page counts against the belt's rated life rather than waiting for a failure. Keep a spare on hand for any printer that cannot tolerate downtime. COLAMCO supplies transfer belts, rollers, and other maintenance parts for the laser printer fleets business, government, and education offices run.