Foshan Stek Technology Co.,Ltd, the company that don't have it's own domain and use gmail for business. I actually went on Chinese Taobao website (something similar as Amazon), the customer review are all in Chinese but very positive for their SLA printers. Early model have connection issues but customer service are very helpful and later review are all very positive. The resin seemed to received lots of "strong" comment, but Chinese Taobao states that they will not accept return on opened resins. They also state their regular resin can be brittle and high toughness resin may not work as well in 3rd party printers. Price is about $28.96/500g (shipping not included)

https://item.taobao.com/item.htm?id=545887152504

https://item.taobao.com/item.htm?spm=20 … 9269783377

Keep in mind that Chinese customer may have low exception than U.S. customers and it also possible their customer service for Chinese customer are strong but might short in technique support that can speak English. 

Major complain on customer review is machine is too expensive ($550-$651 not include shipping) and build volume is too small (60X120X200mm). Again, this reflect Chinese customer's expectation for SLA printers.

Impressive !
What brand of resin is this ?
I've looking for something stronger than the standard stuff. Way too brittle for printing anything functional.

It's their brand Kama Steck or whatever it is.