Robust electronic instrument enclosure made of aluminum die-casting alloy (durable yet easy to machine). The overlapping design provides protection against dust and splashes, and also enhances 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. The waterproof versions comply with IP65 and include a gasket. The gasket is supplied loose in the enclosure (not pre-installed).