Adjustable Brass Tire Deflators are the highest quality adjustable tire deflators on the market, made with 100% brass and rust free inner springs and components. Simply screw onto your tire valve to automatically deflate all tires to your preset pressure.Once you have preset the valve you will not have to set them again, unless you wish to change the pressure setting.
Tire Deflators will not let you down. They have been tested in a variety of conditions, temperatures, environments, and unlike many of the other lower quality tire deflators these will always air you down to your desired pressure and no further.
Feature:
1. 100% Solid Brass Adjustable Tire Deflators, Air Down from 6-30PSI
2. Air down all 4 tires simultaneously to a preset pressure.
3. Simply screw onto your tire valve to automatically deflate all tires to your preset pressure. Fits standard tire valve size.
4. Tested, Proven, Reliable - Brass, and rust free springs and inner components .
Specifications:
Material: Brass
Color: Gold
Product size: as picture
Quantity: 4Pcs
Best Suited For:  4x4,Off-Road,Sand,Mud,Trucks,Baja
Deflating time:About 3-7 min(it depends on the size of the Tyre) 
Instruction: 
Step 1: Deflate a spare/extra tire to your preferred deflation pressure.  
Step 2: With the lock ring and adjusting cap wound down, screw your deflator on the 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.  
Packaging Included:
4Pcs *  Tire Deflators