Hammond 1593 series instrument enclosures hammond 1593xtbu hand held blue instrument enclosure from the hammond 1593 series 140mm in length 66mm wide and 28mm high ergonomically designed for a comfortable fit into the users hand this enclosure has a recessed top for membrane display the unit is secured with self tapping screws and is ideally suited for mounting printed circuit boards hammond 1593xtbu instrument case gpabs 140 x 66 x 28mm translucent blue