Iron, isotope of mass57

Quantity: 600 mgQuality Standards: The iron 57Fe enrichment can be lower than 95 atomic % (as e.g. in the range of 80 atomic % or 90 atomic %).Packing: not importantPlace of Origin: not importantPurity: Purity level should be 99 % or more (better 99.5 % or higher)Standard: noDetailed Description: We are interested in the amount of 500 mg or 600 mg of 95 atomic % enriched iron sample (metal form). If you provide lower enrichment (let say 80 atomic %) then the amount we want is correspondingly larger (700 mg for the case of 80 atomic % 57Fe sample).Do you provide 57Fe metal powder or maybe foil?Metal powder is prefered form.Kind Regards,Joze Moskon