This is the 4902nd most frequent Russian word.
качественных
"Качественных" means "of high quality" or "quality" in English.
'Качественных' is used as an adjective in genitive plural form to modify an omitted noun referring to 'items'.
Мы купили продукты высокого качества, а именно качественных.
We bought high-quality products, specifically qualitative ones.
'Качественных' is an adjective in genitive plural form describing 'профессий' (professions), implying expertise or high standard.
Для реализации задачи требуются специалисты качественных профессий.
To accomplish the task, specialists of qualitative professions are required.
'Качественных' is an adjective in genitive plural form referring to 'товаров' (goods), emphasizing their high quality.