Compatible with Multiple Models: This disk tray (Type D9) is designed to fit seamlessly for NAS models including for DS1522+, DS1520+, DS1019+, DS923+, DS920+, DS720+, DS420+, and DVA1622, ensuring a and optimal performance. Versatile Disk Support: Engineered to accommodate both 3.5inch and 2.5inch hard drives or SSDs, this disk tray provides the flexibility needed for storage requirements, making it an essential component for NAS setup. Enhanced Airflow Design: Specifically crafted to support the airflow requirements of for NAS systems, this disk tray promotes efficient heat dissipation, which helps in maintaining optimal operating temperatures and preventing issues related to overheating. and Secure: Built with high-quality materials, the disk tray ensures durability and reliability. It features a locking mechanism that secures your hard drives in place, protecting your data from physical disturbances and vibrations. Easy Installation and Maintenance: The disk tray is designed for quick and easy installation, allowing for hassle-free maintenance and upgrades. This user-friendly design ensures that you can manage your storage needs without needing professional help. Color: Black Material: plastic Package Contents: 1 x Hard Drive Tray Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.