The caddy is suitable for desktops for most Dell server series that use 3.5inch SAS or SATA drives. Features: Support hot plug 3.5-inch drive bay models R740 RD640 R740XD R440 R340 T640 T440 and more. We make this 14th Generation PowerEdge server trays with exquisite quality and sturdy material. Equipped with release button, it is easily replace your cracked or damaged HDD caddy with an outstanding quality new one for installation inside or outside of your server. Integrated welding louver design to accelerate heat dissipation. Equipped with 4 mounting screws for easy installation and fixation. Specification: Item weight: 92g / 3.25oz Item size: 17 * 10.3 * 2.6cm / 6.69 * 4.06 * 1.02in (L * W * H) Package size: 20 * 12 * 3cm / 7.87 * 4.72 * 1.18in (L * W * H) Package weight: 134g / 4.73oz Compatible with the following servers with 3.5" hot swap drive bays: For R740 For RD640 For R740XD For R440 For R340 For T640 For T440 The above list is not complete. Please check your own server to see if the tray looks like the picture or uses one of the IBM part number listed above, and this is a 3.5" drive caddy, not 2.5", please confirm it before purchasing, thank you! Package List: 1 * 3.5inch HDD Caddy Tray 4 * Drive Mounting Screw (User manual and Hard Disk Drive are not included.)