nurseratchit
GLP-1 Specialist
A lot of people also feel they are just harder to handle because they're so small. They are also really meant to filter about 2ml although people have been successful with higher volumes. There's pros and cons to each and, full disclosure, I ordered 13mm but have not yet filtered anything.the 4mm filters are so SO much more expensive 😠I haven't been filtering up to now, but was seriously considering doing it for this batch of Amo tirz I've been sitting on. Using 4mm filters would make that very cost prohibitive.