7-day promotional license plate key ring customized motorcycle locomotive gift anti-lost keychain

Customize personal gifts for friends, family, colleagues, classmates... The gift is small, the affection is strong... Durable, without losing personality... The perfect combination of cowhide and metal... =========================================================== ========================== Keychain size: Brass long strip: 4*1 cm Brass key ring: 3*3 cm =========================================================== ========================== About Custom & Location: 1 The custom position is the positive and negative sides of the long strip. 2 Due to the small area of one side, it is recommended that the number of custom letters be controlled within 12, and the number of Chinese characters should be controlled within 8 or less. The default picture font is custom-made, with the middle engraving. Please be sure to place a note on the order. 3 As a result of exclusive custom products, once returned, no refunds will be accepted. 4 All gift boxes are packed. =========================================================== ========================== https://img.alicdn.com/imgextra/i4/641317732/O1CN01m5p18326zIsoxO5aa_!!641317732.jpg Brass knowledge and maintenance methods: The oxidation of black brass is because the oxygen in the air reacts with copper. To prevent oxidation, the best way is to isolate the air. For example, the surface of the brass is coated with transparent grease or paint. For brass that has been oxidized, It can be polished with sand or it can be reduced in a reducing atmosphere such as H2 or CO at a certain temperature. Brass maintenance methods are as follows: 1. Store the jewelry separately and mix it with other accessories or hard objects to avoid grinding the surface. 2. Avoid contact with sweat for a long time, thus corroding the surface. 3. Please remove the product during bathing or washing to avoid direct contact with acid and alkali substances. 4. Use clean water, toothpaste, soft brush to restore the surface brightness (grinding, scratching will not be able to recover). 5. When collecting, please use cotton cloth or facial tissue to remove surface sweat and dirt and then store it in sealed bag.