... request) Usage: drink water treatment or oil treatment Specificationsname: magnesium ball or magnesium bean Usage: drink water treatment or oil treatment Shape: sphere, ... : magnesium ball or magnesium beanUsage: drink water treatment or oil treatment Shape: sphere, column styleSize: 2.4mm, 3mm, 4mm, 5mm, 6mm,7mm ... 005≤0.01 Test method:* Mg ball: 3g* Water: 51g* Citric acid powder: 4g Mixed citric acid ...