1)37 years old ISO 9001 factory 2)According to customer's special needs to produce 3)Expressly, our price is very competitive Specificationsname: magnesium ball or magnesium bean Usage: drink water treatment or oil treatment Shape: sphere, column styleUsage: drink water treatment or oil treatment Shape: sphere, column styleSize: 2.4mm, 3mm, 4mm, 5mm, 6mm,7mm (diameter),we can also meet the client ...