na-adjective
superior; excellent; fine; choice
Describes something of high quality, often used for materials, products, or craftsmanship. Somewhat formal and less common in casual speech.
この工房では精良な木材だけを使っている。
This workshop uses only fine-quality lumber.
精良な品を選ぶことが
Choosing superior goods is the secret to long-lasting use.
Compound of 精 (refined, pure) and 良 (good, excellent). The exact historical derivation is uncertain, but the combination naturally conveys 'refined and excellent'.