Incorporating a steel frame and a keylocked 3/16" smoked-gray plexiglass door, our SECL Series locking security covers are offered in 2, 3, 4, and 8 rackspace sizes. Each unit s depth of 1-1/2" easily clears controls on most equipment. Prevents tampering with locking 1-1/2" deep cover; Smoked-grey plexiglass door allows clear view of equipment settings; Compatible with security rack screws for enhanced security