... quality product and service 2)competitive price and prompt delivery 3)small quantity and large quantity are acceptable pls. send ... seamless pipe Size: dia 10mm-630mm Material: 10#-45#, Q345A/ B/ C/ D, 27SiMn, 40Cr, 40CrMn, 20CrMn, 30Mn Executive standard: ... pipeSize: dia 10mm-630mm Material: Q195-Q235, 16Mn, Q345A/ B 3. welding square pipe/ rectangular tube/ galvanized square and rectangular pipe ...