Robust electronic instrument housing made of aluminum die-cast alloy (tough yet easy to machine). The overlapping construction provides protection against dust and splashes. It also ensures improved EMI/RFI shielding. Includes screws that are screwed into factory-threaded holes. The type and number of screws may vary. See details below or in the drawings. The standard versions comply with protection class IP54. Waterproof versions meet protection class IP65 and include a gasket. The gasket is supplied loose in the housing (not pre-installed).