Specifications include, but are not limited to: Compressed Air Dry less than 10 ppm water, 19.5-23.5% Oxygen content. Helium High Purity (99.995%); less than 5 ppm Oxygen, less than 5 ppm water, total impurities less than 50 ppm. Ultra-High Purity 5.0 Grade Helium, CGA-580. Hydrogen High Purity (99.995%); less than 5 ppm Oxygen, less than 5 ppm water, total impurities less than 50 ppm total. Nitrogen Ultra-High Purity (99.999%); less than 2 ppm water, less than 1 ppm hydrocarbons, less than 1 ppm oxygen, total impurities less than 10 ppm. Industrial Grade Nitrogen, CGA-580. Liquid Nitrogen Low pressure. Argon Ultra-High Purity (99.999%). Other gases Provide published price list of any other compressed and liquefied gases available and not identified in the table.