1593AL ABS Plastic Handheld Instrument Enclosures Hammond Manufacturing 1593AL ABS Plastic Handheld Instrument Enclosures are ideally suited for mounting PCBs and ergonomically designed for a comfortable fit into the user's hands. These enclosures feature lap-joint construction to provide IP54 protection against dust and water. The recessed top is suitable for a membrane display or pad. Hammond Manufacturing 1593AL ABS Plastic Handheld Instrument Enclosures offer an optional battery door featuring a long-life, three-snap door.