Hammond 1550Z Watertight IP66 Diecast Enclosures – Hammond 1550Z220, The Hammond Diecast Enclosure (Thick Wall, 222 x 146 x 82mm) Natural 1550Z220 is a thick walled diecast aluminium watertight enclosure with natural or black finish. O ring sealed, tongue and groove construction prevents ingress of dust and water into the enclosure and fixing screws outside the gasket area avoids the need for O rings on the screws. Hammond 1550Z220 Diecast Enclosure (Thick Wall, 222 x 146 x 82mm) Natural