Qingdao Sigma Chemical Co., Ltd (International, US, EU, Canada and Australia domestic

but then what do you use to cover the rubber seal? I didnt read too far back I just saw this comment so idk what you guys are using the vials for but without seals wouldn't they eventually evaporate through the tiny needle holes?

Doing one at a time immediately prior to use is preferable. In that case a 25mm filter would be more efficient.

Homebrewers are, generally, piercing the vials they fill, which isn't ideal as you pointed out.
 
They aren't even sent in the first place.

*well, they are sent, but not delivered.
View attachment 304208
Have you tried adding the recipient's address to your (1) contact list and / or (2) allow list?


 
Have you tried adding the recipient's address to your (1) contact list and / or (2) allow list?


I feel like a monkey seeing a magic trick for the first time.
 
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