... 1.Material:brass 2.Color:nickel free lead free, anti-brass, anti-copper, 3.Have Intertek test reports Prong snap buttonMaterial: brassColor ... , and 30mmProng sizes: 7.0, 7.2, 7.5, 7.8, 8.1, 8.2, 9, 9.2, 9.5, 9.7, 10 ... , 10.2, 10.5, 11, 11.5, 12 ... , men's or women's shirts, coats, jackets, and pants prong snap button