noun
superior goods; quality products
Refers to goods or products of high quality, often used in commercial or consumer contexts.
この店は優良品だけを扱っている。
This store deals only in quality products.
優良品にはそれなりの値段がつく。
Superior goods come with a corresponding price.
良品 simply means 'good product'; 優良品 implies a higher grade of excellence.
Compound of 優良 (superior, excellent) and 品 (goods, article).