Coyote Automatic Tire Deflators, 4 to 56 PSI, 4 Pack IN STOCK  SHIPS TODAY! Adjustment range from 50-3 psi. Factory preset at 12 psi  2 psi. Smallest deflator on the market. Size: 36.7mm X 15.9mm (1.445" X 0.625") Set of four (4) brass tire deflators. Includes leather carrying case. 100% solid brass construction. Factory pre-set to 12 psi. U.S. Made