| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| guolivar | " All the way in New Zealand we also use Gradko for all our passive tubes needs. " | Read more » | over 5 years ago | |||
| Bronwen | "I did a little browsing and so far tthe Ormantine link @warren shared is the only US supplier that comes up quickly (will keep looking), and I have..." | Read more » | over 5 years ago | |||
| warren | " https://ormantineusa.com/diffusion-tubes/ is in the US! Louise Francis mentioned the lab they work with gets them from Gradko -- https://www.grad..." | Read more » | over 5 years ago |