Feature: 1. Applicable Model: The HDD tray is suitable for Lenovo IBM X3850 X3950 X3650 X3550 X3500 X3500 X3400 X3250 X3200 X3690 M2 M3 X5. 2. More Stable: This SAS SATA hard drive tray improves hard drive stability and keeps your data safe and provides excellent performance. 3. 4 Screws: The HDD tray is for 2.5" SFF, not 3.5" LFF. Comes with 4 screws to attach to each tray. 4. Scope of Application: The hard drive tray is suitable for 2.5in SAS / SATA hot swap hard drives, to meet your needs 5. Metal ABS Material: Using sophisticated production technology, made of high quality metal+ABS, this hard drive tray is strong and durable. Specification: Item Type: Hard Drive Tray Material: ABS + Metal Model: 44T2216 Color: Silver Black Size: 2.5in Hard Disk Interface: SAS / SATA (Universal) Applicable Models: Suitable for Lenovo IBM X3850 X3950 X3650 X3550 X3500 X3500 X3400 X3250 X3200 X3690 M2 M3 X5 Package List: 1 x Hard Drive Tray 4 x Screw