Hammond 1593 series instrument enclosures hammond 1593dtbu hand held blue instrument enclosure from the hammond 1593 series 114mm in length 36mm 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 1593dtbu instrument case gpabs 114 x 36 x 25mm translucent blue