R20 Rear Turn Signal Bulb??

Hi Golf R people. GTIer here. I've upgraded my tail lights to the R LED tails and would like to replace the turn signals. I've looked everywhere for more information but to no avail. Just info on the reverse bulbs. Does anybody know what bulbs are the rear turn signals?

Thanks!

It's in the Sylvania bulb thread, I had trouble finding it too.
Turn signal 7440A
Backup/reverse 921

Thank you!