DETALHESNotes on usage (1) The optimum flow of CO2 for Shielding is 20~25?/min. (2) Protect the weld with a screen to prevent blowholes caused by wind where the wind velocity is 2m/sec and more. (3) Keep the distance between tip & base metal at 15~25mm. Shielding Gas 100%CO2 http://www.chosunwelding.com/en/Product/View.asp?Idx=456&Depth1=02&Depth2=