TEST CERTIFICATES AVAILABLE ON BUBBLES.1) TOXICOLOGICAL RISK ASSESSMENT- USA.With reference to US FHSA R 16 CFR 1500.32) CLEANLINESS OF MATERIALS- USA.With reference ASTM F963-07, Section 4.3.6.3 and USP 61.3) HEAVY ELEMENTS.With reference ASTM F963-07, Toxic element test