1.Item:15mm prong snap button 555# 2.Color:NICKEL-FREE NICKEL 3.Material:H-65 brass 4.Past the Needle detector machine 1.Prong snap button included 111#,111.5#,9mm,9.2mm,9.7mm,222#,333#,444#,555#,777#,18mm,19mm,888#,999#,101010#,30mm and so on.2.Color and shape can be made by customer requirements. 15mm prong snap button 555#