| Name | Brass key buckle no taboo

| Material | Brass buckle, alloy safe, alloy no taboo, alloy pagoda, copper-plated gold swallowing gold beast Bell, red agate

| Note | Brass will become black after being used for a long time, which is a normal phenomenon. Brass has certain corrosion resistance. Once it comes into contact with electrolyte such as sweat, it will accelerate the chemical reaction between brass and oxygen in the air to generate black copper oxide, thus the brass will turn black.