Prong type snap button 1.Material:brass 2.Color:nickel free lead ... -brass, anti-copper, gun metal 3.Quality:B grade Prong type snap buttonMaterial: brass Color platings: nickel/nickel free, anti-brass ... ,18, 19, 20,21,22,24,27.5 and 30mm Socket and stud sizes: 7.5, 7.8, 8.5, 9 ... 's or women's shirts, coats, jackets, and pants Prong type snap button