Never saw these before.

Well where a work, one of the products we sell is chromatography tubing. Any material from China can't meet the required surface finish. Tubing from the USA is about a 5% rejection rate. General it's more about quality control from China sucks.
I haven’t used any hydraulic spec tubing made in China in years. Most used to come from Germany then the tariff ruined that. Most comes from the Netherlands now, and the worst and dirtiest we would use comes from India.