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Argon-CO2 5000 PPM-Helium 29.5% T

Linde Part #: AR CD0.5HE1-T  /

 
How do I buy this?
Industrial Gas, 3 Component mixture (CO2, He), Balance Argon, High Pressure Steel T Style Cylinder, 306.85CF, 2400PSIG, CGA 580
 
Industrial Gas, 3 Component mixture (CO2, He), Balance Argon, High Pressure Steel T Style Cylinder, 306.85CF, 2400PSIG, CGA 580