Model - MKS-435TL. Trouble Free Insertion - Improved drive mechanism ensures a sturdy connection and secures hard drives in place. Quality - Aluminum bezel with Space for 4 H.D.D. w/ 3 bay slots and triangular key locks. Easy to Install and Remove - Tray-less design for plug y play and hot swap use. Led Indicator - LED light for power and HDD activity. Space for 4 H.D.D. w/ 3 bay slots. Wide Range Compatibility - Support RAID and Support SATA III (6 Gbps).