Prong Snap  
Description:
Pearl Prong Snap
Material: Brass 銅
Number:  B311MR   
Cap (面) B311MR02:Ø 10mm
Socket (母) B311K101:Ø 9.5mm
Stud (公) B311D106:Ø 9.5mm
Post (底) B311C101:Ø 9.5mm