2nd Hard Drive Caddy for DELL E6540, E6440 Modular Bay (original Newmodeus caddy) Works in E-Modular Bay of Latitude E6540, E6440 Uses 2.5 SATA hard drives 9.5mm-high or less Also compatible with 2.5 SSD Metal enclosure to dissipate heat from the drive and to help reduce EMI noise Manufactured to match shape, color and contour of DELL laptop