Hammond 1593 series instrument enclosures hammond 1593nbk hand held black instrument enclosure from the hammond 1593 series 110mm in length 75mm wide and 25mm 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 1593nbk instrument case gpabs 110 x 75 x 25 black