The Large Brass Steam Whistle 1/4" x 40TPI is an essential component for classic steam enthusiasts and model train engineers. Crafted from high-quality brass, this whistle offers a distinctive vintage sound effect perfect for live steam engines. Its sturdy construction ensures reliable performance, even at high steam pressures. This steam whistle's 1/4" opening allows for precise control over the steam flow, providing a range of tones and intensities. Its unique 40 thread pitch (TPI) design ensures efficient steam transfer and minimized wear, extending its lifespan. Ideal for various steam-powered projects, this large brass steam whistle adds authenticity and charm to any steam-age setting.