Brother BU-320CL Transfer Belt Unit

Brother BU-320CL Transfer Belt Unit The unit is designed for use with our HLL8250CDN, MFCL8850CDW, MFCL9550CDW and HLL9200CDW laser printers. What is a transfer belt?
– A transfer belt collects toner powder particles from each drum unit in a laser printer. A drum unit enables specific toner particles to be applied through an electrostatic charge.
– Most colour laser printers have four different drums for each colour (cyan, magenta, yellow and black). Other laser printers ...will vary, depending on the number of individual toner cartridges inside the machine.