SIBERIAN EXPRESS CHROME PRO- Powerful Train Horn. Three ABS Chrome Trumpets, Metal Painted Base with 12-Volt Electric Solenoid Valve and High Pressure Air system. SIBERIAN EXPRESS CHROME PRO is engineered with the latest technology using reinforced ABS plastic; the sound produced by the three trumpets is incredible! Using reinforced ABS plastic significantly decreases the overall weight of the horn. The reduced weight makes installation easier, ensures less vibration and eliminates the need for extra support brackets to prevent damage to the horn when driving on rough roads. The trumpets are finished with an attractive bright chrome finish and the steel-mounting base is painted silver to help prevent rusting. Wolo is the originator of the ABS plastic train horn SIBERIAN EXPRESS; so don't settle for cheap imitations. SIBERIAN EXPRESS PRO comes with a built-in heavy-duty 12-volt electric solenoid. Learn More