Tired of waiting and waiting for your rifle to cool down? MagnetoSpeed?s new barrel cooler Riflekühl is designed to get barrel temperatures down to intended operating levels quickly. The turbocharger inspired impeller is engineered to produce great air flow in a small package. Powered by a single CR123A Lithium battery (included) ambient air is forced through the extendable nozzle down the bore of the rifle. Designed to seal and push air flow down the barrel where it?s needed to efficiently cool barrels typically under 7 minutes. Riflekühl doubles as a chamber flag and features an exclusive built-in air filter to prevent dust and dirt from being blown into your rifle. Spend less time waiting and more time shooting with the MagnetoSpeed Riflekühl.