here is the response I received from MoreBeer:
The couplers we currently have are gas pipe couplers and do not look as pictured. They have flanges on either end making them almost impossible to get a clean weld on.
We hope to have the regular straight piped couplers back in stock in the next 2-3 weeks. I apologize for the inconvenience. Please let me know if you have any questions or concerns.
Customer Service Manager
If any of you are looking to buy fittings from B3 right now, CONFIRM YOU ARE GETTING THE FITTINGS YOU THINK YOU ARE!!!
This has been a public service announcement from your favorite gnome