Hammond 1590Z Series Type 4X Watertight Thick Wall Diecast Enclosures – Natural – Hammond 1590Z231, A rugged, yet easy to machine, diecast aluminium alloy, electronic instrument enclosure.Its two-piece ‘tongue and groove’ construction combined with a one-piece silicone rubber gasket provides IP66 protection against access of dust and water. Hammond 1590Z231 Watertight Diecast Enclosure 200 x 230 x 112 Natural