The product selection is exquisite,the workmanship is difficult to achieve.Thickened coating, not easy to fade. This Product is made by Zinc Alloy.The 3-way follow strict production and testing standards, which are solid and durable,allowing you to have no worries about filling your core with you.Avoid contact with oil,acid,alkali and salt.he collides and rubs against hard objects to avoid scratches,initially placed in a humid place to prevent metal oxidation.please use soft cloth to clean the surface to keep it bright.