Capacitor question

[night-B]

[Noob mode = on]

I grabbed some sunking before they went out of stock, and Madbean sent me a hard to find capacitor with it.
It's a yellow film box labelled 390 nJ 63. I know this is a dumb question but since in the BOM there are 390nf
3.9nF and 390pF I don't want to go wrong with this one.
I think it's 390nF but usually on caps the code would go to 39pF.
This is the first time I get a cap with a different labelling method...
Am I right? Thanks

Man I hate to feel like a noob again 

[mgwhit]

That's 390nF at 5% tolerance (J=5%) and rated for 63V.

[night-B]

Thanks a lot!

[noob mode = off ]   

[frankie5fingers]

I realize you have the answer already but FWIW, I read somewhere that F = 1%, G = 2%, H = 3%, J = 5%, K = 10%, M = 20%.  I guess there are more but that's all I've ever used.