Application: This Air Horn Tank is designed for use with Car Air Horns and Various Onboard Air System Applications. High-Quality: Precision Welded and Anti-Corrosion Coated for Long-Lasting Durability. Specification: 3/4/5 Gallon, According to your needs, Material: made of high-quality Aluminum. Threaded Size is NPT 1/4. Easy Installation: This air horn tank is lightweight and flexible, Easy and portable to carry air tank can be installed within a few minutes. Excellent service: Your Shopping Experience is Our Priority. Dedicated to Delivering High-Quality Products and Exceptional Service. Reach Out to Us for Prompt and Reliable Answers to Your Inquiries.