This is 3.5 inch X7K8W hard drive caddy tray comepatible for dell PowerEdge Servers 14th gen R240 R340 R440 R540 R640 R740 R740xd2 R6415 ... [HARD DRIVE CADDY SIZE]:(L x W x H)6.8x4.1x1.0 inches [WHAT'S INCLUDING]:You will receive:2pcs HDD tray caddy,8pcs Mounting Screws