This listing includes two charge rollers, also known as PCR units, designed for use in AltaLink multifunction printers.These components are compatible with the following models: C8030, C8035, C8045, C8055, C8070, C7525, C7530, C7535, C7545, C7830, C7845, and C7855.The charge roller functions to apply a uniform electrostatic charge to the photoconductor drum during the printing process.Replacing worn rollers can help restore print quality and address issues related to inconsistencies.This item is a compatible accessory intended to fit the specified printer models and is not an manufacturer part.