Hammond 1550 series die cast aluminium enclosures hammond 1550nbk the hammond ip54 diecast aluminium enclosure black 1550nbk 250 x 250 x 101mm is from a wide range of die cast 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 thin wall aluminium enclosures have high impact strength and are easily drilled and punched