**Material / Size** - Material - Metal parts are brass / Brass — Natural seawater sapphire/wood material - Size - length 8-9cm / width 2cm **"Auricular needle / ear hook / ear clip"** - Needle pin parts are__anti-allergic steel needle__ - Ear hooks are__brass material__ - The metal part of the ear clip is__brass material__ - CM offers all free clip-on services, please inform your needs at the time of purchase - Two options are available below: Screw Clamp / Duckbill Clips > https://c1.staticflickr.com/1/936/43753990471_c5b40c25b0_b.jpg **"Product Maintenance Method"** - Metal parts are brass / Brass - When the brass is used for a long time, oxidation will occur, and the color of the product will be deeper. - It is recommended to place in a sealed bag when not worn to reduce oxidation - Avoid wearing hot springs and swimming **"Precautions"** - All items are handmade. Please be careful not to pull them when you wear them. If you don't wear them, you can put them in small boxes and save them. - Natural stone parts vary depending on stone pattern/color/brightness - The brass part of the product is not plated to retain the original luster. The CM designer loves the retro style after oxidation. It is recommended that you accept it and buy it! Thank you for your interest in CM products. If you have any questions, please feel free to ask us!