Hammond 1593 series instrument enclosures hammond 1593stbu hand held blue instrument enclosure from the hammond 1593 series 92mm in length 66mm wide and 21mm 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 1593stbu instrument case gpabs 92 x 66 x 21mm translucent blue