✔ Compatible with Dell PowerEdge R740, R640, R540, R440 and more. High Quality 2.5″ HDD Tray Caddy for Dell PowerEdge Servers. ✔ Supports 2.5″ SAS / SATA HDD & SSD. ✔ 3.5″ HDD trays. ✔ Includes screws for easy installation.