This was suppose to be a halo ring but when I sent it through net fab it closed the ring part of it. If anyone knows how to fix this I would love to learn how so Im uploading the sketch up file.
The way I ended up printing it is with 100% infill and drilling out the ring.the center of the ring is around 21 mm
I got the halo mask from the sketch up warehouse thanks Grave Heart.
Update: Thanks to AMS3000 we now have our ring so make sure to use hurky heretics halo ring

reduce size by 50%
print with support