> For the complete documentation index, see [llms.txt](https://whitepaper.winnfthero.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://whitepaper.winnfthero.io/3.-nfts/3.1-hero-nfts/3.1.1-quality.md).

# 3.1.1 Quality

There are five levels of quality: N, R, SR, SSR, and UR (ranked from low to high).

<br>