1PCS For MX283 MX363 MX453 MX502 MX503 BK 95% Japan Developer Unit Compatible Brand: Developer unit For use in: MX283, MX363, MX453, MX502, MX503 Color: Black Page Yield: 5% coverage Defective Rate: Less than 0.5% Packing: Bulk packing, bag packing, bottle packing Appearance: Powder, good tint, no agglomeration Product testing includes mechanical evaluation for toner stability without noise, environmental testing for toner performance, duration testing to shelf life beyond one year, and print quality assessment to confirm consistent black output, stain-free results, and resistance to fading.Each unit undergoes pre-shipment inspection.Packaging is designed to prevent powder leakage and physical damage during transit.Product packaging may vary slightly due to manufacturing updates but does not affect functionality.