Rugged, die-cast aluminium alloy electronic instrument enclosure. Tough yet easy to machine. Lap joint construction protects against the ingress of dust and splashing water and also provides for improved EMI/RFI shielding. Unpainted version is vibra finished for a smooth surface with no sharp edges. Four M3 12 mm long stainless steel Phillips head machine screws secure the lid into factory tapped holes. Designed to meet IP54 No internal ribs. Low side wall draft angle.