The AirChime P5 horn is constructed of a sand cast aluminum manifold and sand cast bells providing a stunning mellow tone that only sand cast horns can provide! This genuine locomotive horn features stainless steel diaphragms to prevent rust. These are the only sand cast horns we sell and provide an unparalleled railway train horn sound. The construction of these horns includes rubber gaskets to help prevent wear and tear on the diaphragm through use. These horns will provide years and years of service with the least servicing of any railway horns. The bells are of a one-piece construction and pre-tuned to allow for simple and quick servicing when it is finally necessary. The P-Series horns feature reversible bells to allow for multi-directional signaling and more convenience during installation.