Re the price, I have to say that the cylinders belong to high pressure vessels and quality & safety rank first. Any quality problem may cause big trouble especially in international trading. And we make sure the quality products and after sale service by corresponding cost. We make a reasonable price based on this cost. However considering our future long term cooperation, we would like to make a new quotation to you by narrowing our profit in the attachment, where you may also find the valve CGA320 and its detailed information. Form E is also available for you for FREE helping saving taxes.