... -99.9999% 3.Helium-He,Neon-Ne,Krypton-Kr,Xenon-Xe 4.best quality Neon (Ne), Krypton (Kr) and Xenon (Xe) are ... ≤1,O2≤2,N2≤2,THC≤2,H2O≤42He≥99%Ne( H2),O2 (Ar),N2 ,CH2 TOTAL≤1%99.99-99 ... .996%4N,Ne≤40,H2≤7,O2 ( Ar)≤5,N2≤25,THC≤3 ... ,H2O≤2099.999-99.9996%5N,Ne≤4,H2≤1,O2 ( Ar)≤1,N2 ≤2,THC≤1 ...