Model Compatibility: Fits MS710, MS711, MS810, MS811, MS812, MX710, MX711, MX810, MX811, and MX812 printer models as listed in the title.Quantity Included: Contains 5 pieces of drum cleaning WB replacement parts per package.Function: Designed to clean the drum unit in compatible printer models to restore cleaning functionality.Part Type: Drum cleaning WB component intended as a direct functional replacement for the specified models.Application Scope: Used for drum maintenance in the MS and MX series printers named in the title.