Only the highest quality raw materials are used in the manufacture of Quests' metal line of products. 6063-T6 rated aluminum and top quality ANSI-ASTM cold-rolled steel are used in the manufacture. Our enclosures meet EIA-310D, Mil Standard 189-1 and IEC289 standards of design and manufacturing with NEMA 250, 1 & 2 ratings on our floor enclosures.