Robust electronic instrument enclosure made of aluminum die-cast alloy (durable yet easy to machine). The overlapping design provides protection against dust ingress and splashing water, while also enhancing EMI/RFI shielding. Includes screws that are screwed into factory-threaded holes. The type and number of screws may vary. The standard versions comply with protection class IP54, while the waterproof versions comply with protection class IP65 and include a seal. The seal is supplied loose in the enclosure (not pre-installed).