Compatible with iR ADVANCE 4525i, 4535i, 4545i, and 4551i models for function in volume printing environments. Designed to work with GPR-57, NPG-73, and C-EXV53 components to proper fit and consistent print quality. Rated for up to 200, 000 pages, supporting extended use in busy office settings. Enables straightforward replacement of worn drum components without requiring specialized tools or technical expertise. Helps reduce operating costs by restoring drum unit functionality as an alternative to full unit replacement.