Four-bay large form factor (LFF) hot-plug drive cage assembly - Includes the drive cage structure, backplane board, front I/O board, rack ears, backplane power cables, and 560mm (22.0 inches) mini-SAS cable We ship all products according to manufacturer specifications. If the manufacturer does not include an option as standard with the product (power supply, fan tray etc) we do not either unless specifically stated. If you are have questions regarding what is included with a product, please contact us.