We hold the tighten quality controlling from very beginning to the end and aim at 100% error free. You can require for after-sale customer service if there is any problem. Every orders should be passed through our QC department before shipping.
If you have any testing requests for the aluminum profiles, please advise us and we will arrange to ask the third party authority to test for the products.
Actually, we will ship the first sample for you to confirm the aluminum quality, then we will begin to the next loop to talk to you. For the mass production, our QC department will inspect each product carefully and turn into the packing department for checking again. So if you find any problems for our products, please feel free to contact us and we will try our best to deal with them. Thanks for your support!