ICY DOCK DataCage Classic MB453IPF-B 3 x 3.5&rdquo; HDD in 2 x 5.25&rdquo; Bay SAS/SATA HDD Rack / Cage / Module 3 in 2 RAID back plane module Fits three 3.5" SAS or SATA I/II hard drive fully supports Hot-Swap function Compact and space saving for multiple drives fit (three drives within two 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