These earring parts are made of surgical stainless steel, which is highly regarded for being gentle on the skin. They are made from the same material as scalpels and scissors used in surgical procedures. We highly recommend them to those who suffer from metal allergies. They are also praised for not causing itching even in the summer. You can confidently recommend them to others, so why not professionals incorporate them into their own creations? In my shop, even those who experience allergic reactions to gold or titanium are using them. The ring below the ball is an open jump ring. The position of the cut is not necessarily fixed. Ball type With catch 5 pairs (10 pieces) Ball diameter: 4mm Pin thickness: 0.8mm Pin length: 12mm No comment needed Immediate purchase OK. If you wish to purchase multiple sets or combine them with other items, please let us know in the comment section. We will offer a combined discount and prepare a dedicated page for you.