Four-bay large form factor (LFF) hot-plug drive cage assembly - Includes the four-bay drive cage structure, front panel board, front USB cable assembly , and front panel cable assembly - Does NOT include the back-plane board assembly 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.