[material]: S925 silver plating 14K gold (thick plating color retention time is long) [specification]: the chain is about 0.8mm thick, and the bead is about 1.7mm at its widest point. 15,16,17cm optional [color]: 14K gold [maintenance] sterling silver plated with K gold, of course, will oxidize over time, you can wash with toothpaste or detergent, and put it into a sealed bag when not wearing it. [packing]: independent transparent sealing bag, no packing box. If necessary, you can shoot it outside and support a generation of hair.