Wolf brand, and it’s threaded 1/2x28 to boot! Pretty sweet deal:
https://www.aimsurplus.com/product....ail&utm_term=0_6870497a6a-3a6a203957-19016117
https://www.aimsurplus.com/product....ail&utm_term=0_6870497a6a-3a6a203957-19016117
I think you're supposed to change out your extractor, too, right? I know that sounds annoying, but it's really stupid easy to do.