Hammond 1550 series watertight die cast aluminium enclosures hammond 1550wjbk the hammond ip66 diecast aluminium enclosure black 1550wjbk 275 x 175 x 67mm is part of a wide range of die cast watertight aluminium enclosures in industry standard sizes that will provide mechanical protection making them suitable for a use in a wide variety of applications the range is available with a natural or powder coated black finish the units are supplied with a separate compressible self adhesive gask