Horns have been used in shipping and other forms of transport for centuries to attract attention and give warning, particularly in fog. Their traditional mouth horns are solid brass with nickel-plated mouthpieces and strong brass 'reeds' For longevity. Their 'taxi' Horns have rubber bulbs and deliver a hefty, and somewhat amusing, 'honk honk', evoking images of classic early cars negotiating crowded city streets and bustling harbors being Criss-crossed by a myriad of small craft.