... : *material:brass *size:8.5mm,12mm,15mm,17mm,19mm,21mm *color:nickel&nickel-free, 19mm snap-fastener & button with six holes:*material ... :brass*size:8.5mm,12mm,15mm,17mm,19mm,21mm*color:nickel&nickel-free,black nickel,anti-brass,honed ... quality and reasonable price)*Eco-Friendly,Nickel-free,Lead-free 19mm snap-fastener & button with six holes