Got ripped off by knock off artists. Pretty much all the manufacturers on Alibaba are stealing others work and trying to copy it. Unfortunately for buyers, they aren't very good at it.
If you can't afford to go there and manage the manufacturing process with your own eyes, it's not worth the junk you'll receive.
Tried to buy a dustless blaster from Quindao Rovan and got a piece of junk with undersized parts, parts that were literally taped together, and blew up daily. It's also missing many of the features advertised and leaks.