@Griffith17431 @xrelaht @AbraarKaran @ZerlinaMaxwell 3m lists authorized resellers on their web site, but the 9210 only appears to be available by the case.
Also, they're considered by 3M to have different fit (there is an equivalence chart and these are NOT equivalent). If one fits you really well, don't switch to the other one.
@Griffith17431@xrelaht@AbraarKaran@ZerlinaMaxwell 3m在其网站上列出了授权经销商，但9210似乎只在案例中可用。
此外，3M认为它们具有不同的拟合度（有一个等效图，但它们并不等效）。如果其中一个非常适合你，不要换另一个。