1. What is Sterling Silver 925? 925 refers to the 92.5% content of silver in the alloy, it has the most ideal hardness, luster and oxidation resistance, and it is an international standard for the identification of silver. 2. Why we should wear Sterling Silver? Silver is a natural bactericidal preservative, hypoallergenic, wearing it can help us resist oxidation and avoid skin allergy. 3.How to protect silver jewellery? Care should be taken to avoid your sliver contact with cosmetics and collision, don’t wearing when at bath or sweating, and should wash it regularly. 4.Why it become black when wearing for a long time? The sulfur molecules in the air and the air produced a chemical reaction that produced a black chemical, also known as oxidation The silver and toxin in the body produces chemical reactions. 5.How to clean silver jewellery? You can put some toothpaste on an old toothbrush and gently rub the toothpaste into the silver. Let it sit for a few minutes and wash it off. Using professional rub silver cloth to wipe is one of the fastest and most convenient way. Rub silver cloth containing silver maintenance ingredients, it can not be washed, can be used for many times. STERLING SILVER EAR WIRE .025"/.64MM/22 GA ROUND WIRE W/COIL Made in the.