Trailhead Automatic Tire Deflators will automatically reduce the air pressure in a tire to a predetermined level and stop, preventing any further loss of air from the tire. They will function properly whether your vehicle is stationary or traveling at speeds of 20 mph or less.
Comes with: -4 Tire Deflators -Allen Wrench -Tire Pressure Guage -Tire Deflation Guide -Instructions -Heavy Duty Carrying Case
