This pack includes 4 developer units compatible with the D-FC505 E model for use in 2505AC, 3505AC, 4505AC, and 2515 printers.Each unit contains 250g of CMYK color developer material.The developer is manufactured in Japan and engineered for consistent performance.All units undergo functional and print quality verification prior to shipment.The material is evaluated for stability, environmental resistance over a one-year period, and produces clear, fade-resistant output without smudging.Packaging is designed to prevent leakage or damage during shipping.Product packaging may vary slightly due to production updates but maintains equivalent functionality.