: This kit allows you to Air Down tires in short period and you do not have to wait and keep an eye on tire pressure. The Deflator Valve automatically stop at your pre-set PSI value. ACCURACY: Each is individually Calibrated, yet +/- 2 PSI is considered acceptable. The deflator kit is designed for quick off road air down set up, but not for accurate vehicle tuning. ADJUSTABLE: No Tools are required. The come with Clear Scale Display, adjust the desired Air Pressure and it stop letting air out when the PSI value has been reached., simply by twist the Deflator Shell. Adjustable Range from 30PSI to 10PSI. HIGH ACCURACY: The with scale display, as you can see clearly with PSI you need, and is easy to set. COMPACT: The 8pcs deflators fit easily the palm of your hand with the included 2 bag to store, air down all four tires in just a few minutes. It be a Tire Air Down Tool for your car, motorcycle, truck, bike, SUV, RV or ATV. Size: 58mm high, hole diameter 7mm Colour:As Shown Material:Metal Package Contents: 2 set x Adjustable Auto-Stop Valve Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.