It's A Boy Dangle Pregnancy Belly Bar
Flexible longer length belly bar suitable as a maternity retainer, or if you just need a longer bar.
The belly bar is PTFE, which is bendy, and self-threading. The bar supplied is around 2" long, but you can cut this to the length required and then just screw the balls back on! (They're supplied really long so there's extra there to keep - cut it to the size you need now and keep the extra for later on in case you need a longer bar!)
Pregnant bellies need a much longer and more flexible bar to prevent tearing.
Now there is no need to lose your piercing while expecting!
Please note - these dangly styles are not going to be suitable for every day wear, especially once you get bigger, they are more novelty/special occasion use than wearing every day.