Shielding Gas ( Mixture of Argon 85 % +/- 1 % & CO2 15 % +/- 1 % ). Each cylinder consisting of 7 Cubic Metre, Gas weight 12 Kgs +/- 0. 5 Kgs, Pressure 145 Kgs +/- 1 Kg per Sq Cm, with manufactures test certificate for Gas composition. Make: MSPL/ Praxair/ INOX/ Southern Gas or similar.