Crafted from the highest quality material ensuring quality and durability For outdoor use Made in Switzerland Each replacement filter element has a silver rock core which elongates the life of the filter element Cleanable ceramic filter element last up to 13,000 gallons Each replacement filter element has a silver rock core which prohibits bacteria growth and elongates the life of the filter element Cleanable silver impregnated ceramic filter element last up to 13,000 gallons Replacement filter element includes measuring gauge to indicate when to replace