Product Detail: Question1:What is the type of payment? Answer: Usually you should prepay 30% of the total amount. The balance should be pay off before we get the original B/L. Question2:How to guarantee the high quality? Answer: We have testing department to make sure every product of size,appearance and pressure test are good. Question3: How long will you give me the reply? Answer: we will contact you in 12 hours as soon as we can.