Gentlemen...
I'm here again... after a long time.. to leave another brief message about
@Qingdao Sigma Chemicals ...
A few more orders received... all ok... Easy communication, nothing to complain about the source...
They forgotten to send my order (something that is understandable, I've wait about three weeks and had not received tracking, so... I got in touch again and quickly in less than 1 day, my packages were sent) something extremely understandable, given the source's large sales volume...
After that, I received my orders in about 4 weeks... ok for me... considering that the delivery service in my country and the inspection are quite bureaucratic...
finally... Again I have to say that I strongly recommend qsc... I've already made other purchases and have always been satisfied.
Good price... good quality... easy to negotiate...
My 2 cents to the topic...