GC Initial IQ lustre paste NF
shade Lustre Neutral ( L-N)
You would probably need to order the refresh liquid as well.
You use this to refresh the paste when you haven't used it for a while.
If you ever need to reglaze a crown where it's been adjusted or to modify a shade then you can expand your stock when needed.
Maybe order a L-5 ( light blue) and /or L-6 ( dark blue).
This is a low fusing nano ceramic so it can be applied to any porcelain including pfms.