Our products are certified by SGS, the world's largest and oldest multinational company for product quality control and technical certification: 1. Silver(Ag): 935.7‰ 2. Nickel release: Pass
Our products are certified by SGS, the world's largest and oldest multinational company for product quality control and technical certification: 1. Silver(Ag): 935.7‰ 2. Nickel release: Pass