chinese valve

hey everybody
first sorry for my english i am french :biggrinn:
i have just to see that on aliexpress
http://www.aliexpress.com/item/BOSS-valve-for-high-pressure-pcp-hand-pump-4500psi-factory-outlet-on-sale/1792445413.html

have you ever tested it?
the quality seem fine and the price is good for this kind of product