~~ Al99.90, Al99.85, Al99.70, Al99.60, Al99.50, Al99.00, Al99.7E, Al99.6E & rdquo; (Note: Figures Al after aluminum content). Someone called & ldquo; A00 & rdquo; aluminum is actually aluminum containing 99.7% pure aluminum on the London market called & ldquo; & rdquo ;. standard aluminum We all know that our technical standards in the fifties