Features: No tools required Can be used on any standard for valve stem Adjust tire pressure from 6 to 30psi. in 3psi increments Easily disassembled to clean out sand or dirt Simply thread onto stems and walk away Manual start/stop for valve built in Made from brass material to eliminate rust Air immediately releases from tire once screwed on Instruction: Step 1: Deflate a spare/for extra tire to your preferred deflation pressure Step 2: With the lock ring and adjusting cap wound down, screw your deflator on the for valve stem.(Be sure to make sure the threads are clean and in good condition) Step 3: Loosen cap (counter-clockwise) until deflator pops open, then immediately tighten cap to the position where the air stops exhausting Step 4: Turn lock ring up to adjust cap and tighten Step 5: Installation is now complete and set to your preferred deflation pressure NOTE: When the tire pressure and the deflator setting within 8psi, a manual start may be required by fitting the deflator then lifting the center pin to start operation Specifications: Material: Brass Pressure Range: 6-30 PSI Overall Size: 12x39mm/0.47x1.54" Interface Diameter: 8mm/0.31" Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! No Retail Package Package Contents: 1 x Tire Deflator