- Compact 15" Depth. - 1.6mm Steel Body Chassis. - Shock Absorbing Drive Cage. - Front Access USB2.0 x2. - 40mm x1, 60mm x2 Cooling Fan. - Removable Air Filter. - Fan and Temperature Monitor Option. - Industrial Keylock Bezel. iStarUSA Rugged E-30 rackmount chassis is designed to withstand the toughest and compact environment. E-30 is 3U height with only 15" in depth and special features of front USB access, ball-bearing cooling fan, and system sensor board to enhance functionality and usability for critical missions and applications.