Old bronze ship's bells, artistic wine casks and other finds from the Bronze Age (from approx. 6000 BC.) impressively prove this materials unusual durability. And that's still true when the witnesses of this creative epoch have been laying in salty sea water for thousands of years. The gunmetal cast by KEMPER is a material closely related to bronze (copper and tin) and is extremely suited for use in domestic water engineering, especially in drinking water and heating installations.