ICY DOCK 5 Bay EZ-Tray 3.5" SATA Hard Drive Advance Monitoring Backplane Cage in 3 x External 5.25" Bay - DataCage Classic MB455SPF-B Compact and space saving for multiple drives fit (Five drives within three 5.25" bay fitting). Internal drive security, exchangeability, expandability and maintenance capabilities. Durable aluminum body for excellent heat dissipation with stylish outlook. Detachable 80mm ball bearing rear cooling fan for easy maintenance. Advanced drive monitoring system built internally w/ visual & audio indicators.