Hammond 1590W Series Watertight Diecast Aluminium Enclosures – Natural – Hammond 1590WN1, This Hammond 1590WN1 enclosure measures 121 x 66 x 40mm and is part of a range of natural finished, watertight diecast aluminium boxes suitable for a wide range of applications. Hammond 1590WN1 Watertight Diecast Enclosure Natural (121 x 66 x 40mm)