❤Material: Stainless Steel and alloy, it is hypo allergenic, it doesn't rust, change colour or tarnish and it is lead free and nickel free. ❤Size: Atom charm is 2.2 cm(0.87 inch) * 3.3 cm(1.3 inch). ❤Awesome Atom Zipper Pull. This beautiful Zipper Pull will make a great accessory for back to school time. It'll make a great gift to pamper any physicist, chemist or biologists in your life. It'll bring a smile to any science enthusiast face. ❤Atom charm on a lobster claw clasp to add to your charm bracelet, hang from your purse, bag or backpack, mark your stitches or progress keeper for your crochet or knitting projects, hang on a necklace or any other way you would like to use it. ❤Package: The zipper pull will arrive in a velvet bag ready for gift giving. Awesome Atom Zipper Pull. This beautiful Zipper Pull will make a great accessory for back to school time. It'll make a great gift to pamper any physicist, chemist or biologists in your life. It'll bring a smile to any science enthusiast face.