Dear you,
I have 50 DF and 100 DF tube filters.
I know I need phase con. filter for using these tube filters.
So, I found below phase cond. filter.
But, I don't know which is right for my tube filters.
Is there anyone who can tell me which one to choose?
(https://www.mikroskopie-forum.de/pictures012/322295_33420276.jpg)
I found phase cond. filter.