GAI-Tronics Aluminum Horn This is very unique and good quality product introduced by Gai-Tronics which is very helpful while communicating in industrial area at the time of emergencies, for example in case of fire explosion and blast, and it is highly resistant to chemicals and various temperatures, its water proof and not as much expensive as the aluminum horn are in the markets. Features: 45 Degree Moderate Distribution Angle Unique Metal with Greyish Stick Finish U-Bracket Offered for Adaptable Mounting Allows GAI-Tronics DIV 1 & DIV 2 Drivers Contains 1 3/8"- 18 UNEF Place (Female) for Car owner Connection