Features Hadley is the worldwide leader in air horn systems. The extensive product line also offers horns with a matte black, chrome, or anodized aluminum finish. Hadley air horn systems are widely used as original equipment on over the road, tractor/trailer rigs. When used in conjunction with the hadley air compressor, our air horns are popular in a variety of vehicles – Suv’s, 4×4’s, vans, pickup trucks, motor homes, motorcycles, and power/sail boats. Port size – 1/4 in. Capacity – 138 cubic in. Color – Black
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