National standards and non-standard specifications for glass instruments?
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What is the difference between national standards and non-standard specifications for glass instruments? Why is there such a big difference in prices? And the seller is also not very willing to buy products that meet national standards? Why?
There are standards for glass instruments in the friend’s information section; you should take the time to check it out. I’m sure that after seeing it, you’ll accept the price difference between the two
The difference between standard and non-standard products lies in their quality; sellers usually sell non-standard products at the price of standard ones in order to make big profits. During bidding processes, only the name of the glass instruments is specified, with no requirements regarding quality, so bottles and containers of whatever quality can be used.