304 Stainless Steel Earstud Components. Size: about 4mm in diameter, 6mm wide, 15mm long, pin: 0.4mm, hole: 1mm. These secure and stylish earstuds will add right amount of flair to your earring designs. You can add sparking and elegant gemstone to the earring. Due to the material of 304 Stainless Steel, they are of corrosion and stain resistance. And buy this 10 pcs 304 Stainless Steel Earstud Components For $1.02 @PandaHall.