20390 5 gallon capacity ASME certified tank designed for commercial use on all tires ATV to 24.5" truck tires. All units come equipped with the New Cyclone X-Series UPGRADE Kits with the New and Innovative Quick Release Valve for faster and easier air release. The New welded tab on 20390 barrel allows it to lock securely on the rim edge for better control of air discharge between the tire and wheel. Safely rests on your leg at a 45 degree angle to the wheel.