How many micron plastic bag is allowed to be used in your country?
How many micron(thick)plastic bag is allowed to be used in your country?
By this I mean to ask, what is the allowed thickness of plastic bag in country. Some countries doesn’t allow plastic bags with thickness above a certain rate to be used.
In these question if I add “thick” before “plastic bag” as ist case with my second sentence.would it be more grammatical or unnatural? I couldn’t be sure if I should add it or not in sentence I saw in a article.
And Is the first sentence grammatically correct?