Gem bids for Nitrogen Gas 99.99% Purity, Hydrogen Gas 99.99% Purity, Oxygen Gas 99.99% Purity, Helium Gas 99.99% Purity, Nitrous Oxide N2o 99.60% Purity, Acetylene Gas 99.60%Purity, Zero Grade Air 99.99% Purity, Carbon Dioxide99.50% Purity, Anaerobic Gas Mixture