Hi how are you,It is nice to write to you. This is vishal from India. I am interested in this style of hastelloy s welding pipe/seamless tube and in doing business with you.May I know more information about product such as:Diameter,Special Pipe,Outer Diameter,Do you have any quality assurance certificates?Please copy and paste the questions and answers back to me.Thanks/RegardsvishalBansal Alloy Products Show More