L'articolo partitivo (partitive article) is used to indicate imprecise or approximate quantities. It appears before singular nouns (
Ho delle cravatte blu. (I have a few blue ties.)
Prende
Esco con dei compagni. (I go out with some friends.)
Manca
ITALIAN PARTITIVE ARTICLES
SINGULAR
PLURAL
feminine
delle
delle
feminine (before a vowel)
dell'
delle
masculine
dei
masculine (before a vowel)
dell'
degli
masculine (before the letters z, x +consonant, and gn)
dello
degli
From:https://www.dbfei.com/Article/yidaliyu/201311/7725.html