The phrase "specific variety" refers to a particular type or kind of something. It implies that there are different types within a broader category, and the specific variety specifies which one is being referred to. Full definition
They are not just interested in price, but actually ask for specific varieties and styles. (fb101.com)
You know, why they use only British - grown flowers or why they use specific varieties instead of maybe using more popular varieties. (entrepreneur.com)
Plants are optional, believe it or not, but most projects recommend specific varieties selected for size, shape, color and habitat, and are easy to maintain. (bookpage.com)