Replacement Resin for your Gravity-Fed Iron Water Bottles. 

• Removes harmful impurities and hard-water deposits in your water supply to keep your iron in good working condition.
• Resin particles changes to an amber color letting you know when its time to change
• Removes calcium & magnesium. 
• Longevity of resin depends on how often the iron is used and type of water being used. 
• Store in a cool, dark place.
• 14 oz per bag.