**"Material/Size"** -Material-all metal parts are brass/Brass — Amethyst -Size—length 5cm/width 1-1.5cm **"Ear Needle/Ear Hook/Ear Clip"** -The acupuncture parts are all__anti-allergic steel__ - ear hook are all__brass__ - ear clip portion are all metal__brass__ -All CM products provide free clip-on service, please inform your needs when purchasing -Two options are provided below <Spiral Clip/Duckbill Clip> https://c1.staticflickr.com/1/936/43753990471_c5b40c25b0_b.jpg **"Product Maintenance Method"** -Metal parts are all brass/Brass -Oxidation of brass will occur after prolonged use, and it is normal that the color of the product will deepen! -The surface can be gently wiped with copper cloth or copper oil -It is recommended to put it in a sealed bag when not wearing it to reduce oxidation -Avoid wearing in sulfur hot springs and swimming **"Precautions"** -The products are all handmade, please be careful to avoid pulling hard when wearing them. You can store them in a small box when they are not worn. It is less likely to damage the products -The natural stone part is different according to the stone pattern/color/brightness etc. -The brass parts of the merchandise are not plated to retain the original luster. The CM designer himself loves its oxidized color and texture. It is recommended that you accept it before buying it! Thank you for your love of CM products, please ask us if you have any questions!