Typical Certs
Acetylene Gas	Hydrogen Grade Zero
Breathing Air	Nitrous Oxide Grade Atomic Absorbtion
Dry Air	USP Nitrous Oxide
USP Air	Nitrogen Grade 4.8
Air Grade Ultra Zero	Nitrogen Grade 5
Air Grade Zero	Nitrogen Grade Zero
Anaerobic Mixture	Nitrogen Industrial Grade
Argon Liquid	Nitrogen Liquid Industrial Grade
Argon Grade 4.8	NF Nitrogen
Argon Grade 5	Nitrogen Oxygen Free
Argon Industrial Grade	Nitrogen Research Grade
Argon Grade Zero	Nitrogen Grade Extra Dry
Carbon Dioxide Industrial Grade	Oxygen Aviators Breathing
Carbon Dioxide Instrument Grade	Oxygen Grade UHP
Carbon Dioxide Instrument Grade Specific	Oxygen Grade Zero
USP Carbon Dioxide	Oxygen Industrial Grade
USP Carbon Dioxide Liquid	USP Oxygen
Helium Grade 4.5	Oxygen Grade Extra Dry
Helium Grade 5	Silver Shield 12
Helium Grade Zero	Silver Shield 4
Hydrogen Grade 4.5	Silver Shield 6
Hydrogen Grade 5	Silver Shield 7
Hydrogen Industrial Grade	Silver Shield 8