ProOne mineral cartridge 4" should be installed after RO membrane. This will give you taste of true mineral water. Mineral cartridge comes with the 4-Stage Mineral Filter Cartridge which contains Silver Activated Carbon, pH Balls, Rice balls and Mineral Balls.
ProOne Mineral Cartridge 4"
MAX FLOW : 200 Ltr./hr
MAX PRESSURE : 6 Bars
MAX WATER TEMPERATURE : 30 degree
LENGTH : 9" (approximately)