... 17mm,19mm,21mm *color:any colours available *Small order are accepted 8.5mm snap-fastener & button with 4 holes:1)material:brass2) ... color:nickel&nickel-free,black nickel,anti-brass,any colours available4)quality:strong tension,not get rusty,not easy to be ... service is welcome7)Widely used in leisure clothes,down jacket,jackets,kid's garment,etc. 8.5mm snap-fastener & button with 4 holes/spring button