Prong type snap button 1.Material:brass 2.Color:nickel free lead free, anti-brass, anti-copper, gun metal 3.Quality:B grade Prong type snap buttonMaterial: brass ... , 15, 17, 18, 20.8, 23, 25.4, and 30mm Prong sizes: 7.0, 7.2, 7.5, 7.8, 8 ... , men's or women's shirts, coats, jackets, and pants Prong type snap button