Icy Dock offers the MB561US-4S-1, a 4-bay hard drive enclosure with USB 2.0 and eSATA dual interface. The aluminum enclosure has four 3.5-inch SATA I/II drive bays with support for SATA hotswap.
The Icy Dock MB561US-4S-1 features shock-absorption hard drive tray, three speed adjustable cooling fan, a detachable 80mm ball bearing rear cooling fan for easy maintenance and rubber padded soles for scratch protection. It works with Mac and Windows PC. The enclosure is priced at $245.99.