... anti-brass, anti-copper, 3.Have Intertek test reports Prong snap buttonMaterial: brassColor platings: nickel/nickel free, anti-brass, ... 8, 9, 10, 11, 11.7, 12, 12.5, 13, 14, 15, 17,18, 19, 20,21,22 ... ,24,27.5 and 30mmSocket and stud sizes: 7.5, 7.8, 8.5, 9.5, 11, 13, 15, ... , 26.5, 29, and 30mmApplications: children's garment, men's or women's shirts, coats, jackets, and pants prong snap button