The J2160 and J2660 are the first of a new line of reconfigurable cases, designed to adapt for your needs. At only 20.5" deep, this new chassis is our shortest 2U that can house full-size ATX boards and full-length PCI cards. Its unique, adaptable bay design allows for up to two removable 3.5" hard drives and a slim DVD\u00b1RW drive. Three 80mm system fans and a compartmentalized layout ensure cooling of all components by forcing airflow through all internal and exposed drive bays. Both air intakes are also guarded with removable air filters for easy, tool-free maintenance. Behind the wide, lockable access panel are two front-panel USB ports, a system reset and the ATX power switch. Inside are four bays for hard drives suspended on shock-resistant, vibration-dampening grommets. An adjustable baffle and row of tie-down slots keep cables neatly secured. Adjustable card-edge retainers are provided in two different lengths (three long and three short) to keep PCI cards securely fastened. Three full-height card slots are available on the standard chassis with a wide range of riser cards to choose from. With the optional, 7-slot rear panel, up to seven low-profile PCI cards can be used. Drive Bay Configurations: The standard chassis is equipped with one 5.25" bay and one "low-profile" 5.25" bay with a 3.5" bay adapter. "low-profile" bays are the same width as 5.25" bays, but only 30mm high. A) 1x 5.25" bay, 1x 3.5" bay: The 3.5" bay is in a vented adapter for hard drives, card-readers, or any other 3.5" bay device. B) 1x 5.25" bay, 1x low-profile, 5.25" bay: Storcase\u00ae model DE75 removable hard drives can be mounted directly into these low-profile bays. CRU Dataport\u00ae model DPLP removable drives can also be mounted using the RK624\/RK625 bracket. C) 2x low-profile 5.25" bays, 1 slim-CD bay: This setup allows for two removable hard drives to be mounted, without sacrificing an optical drive. A slim CD\/DVD drive and RK626\/RK627 bracket are required.