steel pipe ,1,Grade: S45C, S50C, GCr15 , ASTM4140,ASTM4130 2, SIZE: outer dia :less than 300mm, thick less than 30 mm STEEL TUBE65 ... is example , which we exportedWe are making the steel pipe all the time ,the detail information is as flw : ... SIZE: outer dia : less than300mm, thick:less than 30 mm 3, payment : BY 30% T/T in advanced or L/C ... forward to the cooperation with you in the future . steel pipe