PurolatorONE = 99%@30um, NOT 20um like it says on Amazon

[Robvette]

Since M1 filters are also made be Mann-Hummel and are 99%@30, they’re probably identical to PureOne.

I’m cutting a bunch of new filters open soon so we’ll see if they look identical too.

 

[Bellavita]

Correction . . . L14615 99% @25

 

[Robvette]

Correction . . . L14615 99% @25

So their cheapest filter is more efficient than the pure one filter?