This listing includes five Primary Charge Rollers (PCR), part numbers 2LV93010 and 302LV93010, designed for the MC-3100 unit.These components are compatible with printer models FS2100, FS4100, FS4200, FS4300, M3040, M3540, M3550, M3560, and P3045.The primary charge roller functions to apply a uniform electrostatic charge to the photoconductor drum during the printing process.This replacement part is manufactured to meet equipment specifications for fit and function, ensuring consistent print quality and reliable within the specified printer models.Each unit undergoes testing prior to packaging to verify performance standards.Please verify your printer model and existing part number before purchase to ensure compatibility.