HOUSWEETY 500pcs Open Jump Rings for DIY Jewelry Making 4mmx0.6mm Main Material:Stainless Steel;Main Color:Dull Silver Tone; Outside diameter:4mm;Wire:0.6mm;Hole Size:2.8mm; High quality stainless steel,no fading, nondeformable,allergy free Environmental protection,beautiful appearance,light weight,convenient installation.Beware of swallowing by children. Perfect findings for a variety of jewelry making.Every findings has its unique design and style and theme, hence the jewelry made with them are unique and represent your own fashion.