HADLEY H09321AC 21″ eTone Air Horn

Headquartered in Grandville, MI, Hadley® designs and manufactures valves, air horns, mirrors, and height control systems for heavy duty, commercial, and recreational vehicles. Hadley air horns are a particular favorite amongst truckers due to their signature low, throaty sound that's discernible even at long distances. The company also manufactures the SmartValve line of electronic height control system components, whose simplified and compact design helps reduce injuries and downtime during maintenance and improve fuel economy. All Hadley products are built and assembled in state-of-the-art facilities with four ISO certifications via ANAF to ensure compliance with international environmental, safety, and quality standards.