925 sterling silver necklace, you can also freely purchase NI.KOU pendant, buckle on the chain to create a match, create your own style. https://c1.staticflickr.com/1/461/31621501736_51f96c937b_o.jpg ●Material: 925 sterling silver ●Chain length 16吋: The total length of the buckle is about 39.5~40.5cm 18吋: The total length of the buckle is about 44~45.5cm ●Extended chain plus purchase area: https://www.pinkoi.com/product/6Jtn9C2E?category=2 ●Style: Thin chain / chain width of about 1mm https://c1.staticflickr.com/1/729/32346589646_8ac7eef5b3_o.jpg Basic chain / chain width about 1mm https://c1.staticflickr.com/1/581/31574745843_381a93cff6_o.jpg Bead chain / chain width about 1mm https://c1.staticflickr.com/1/389/32346589816_1ac537a627_o.jpg Small circle chain / chain width about 1.5mm https://c1.staticflickr.com/1/674/31574745963_bd4cccdb2e_o.jpg Small square chain / chain width about 1mm https://c1.staticflickr.com/1/471/33013116905_ed4b15e3dc_o.jpg ●**Please confirm the size of the model before ordering, and the order is not returned!** ●Maintenance The silver chain part is not provided for maintenance. If the jewelry part is to be repaired, please provide pictures and discuss with the designer. Depending on the damage status, you need to pay the freight separately. ●Maintenance knowledge 1. All accessories, no matter what kind of material are afraid of moisture, especially rain, sweat, perfume, bathing hot springs, chemical products, etc., will seriously damage the jewelry to produce oxidation, so should try to avoid and stay away. 2. Jewelry is recommended to wear often, the body's oil can make the jewelry produce a natural and lustrous beauty. 3. Jewelry will produce oxidation, vulcanization or oxidative yellowing and blackening signs with time. You can use a moist soft toothbrush with toothpaste or toothpaste to lightly brush the surface, or use a silver cloth or a copper cloth to wipe the original. Metallic luster. 4. If the jewelry is specially vulcanized, do not over-wipe it to avoid the vulcanization design effect disappearing. 5. If you are worried that the chemical emulsion of silver cloth and copper cloth will cause skin allergies, you can wash it off with water and dry it before wearing it. 6. Natural stone, crystal and pearl can be cleaned with water and then wiped with a soft cloth. 7. When not wearing, clean and put it in a sealed bag to save the oxidation speed. 8. Do not put all kinds of accessories in the same jewelry box. The hardness of the jewelry will rub against each other and cause wear and tear. 9. Never use any other tools to clean your accessories. It will leave scratches on the surface of the jewelry. If a brush is necessary, use a clean or very soft brush to brush your jewelry.