The Kleinn Model 6260RT is a heavy-duty, 0.5-gallon steel replacement air tank specifically engineered for use with the 6260 onboard air system, as well as the HK1 and HK2 air horn kits. Built for long-lasting dependability and maximum space efficiency in compact vehicle spaces, this rugged replacement tank is outfitted with five versatile 1/4" NPT ports to allow for clean plumbing, secure mounting, and an easy-access moisture drain point to keep your high-pressure horn system operating flawlessly.