WHY YOU NEED A AIR GAGE: A reasonable inflated tire save fuel, increase the tire's lifespan, improve the driving experience, and insure the driving safety. Please use tire gauge to test the wheel pressure every week regularly when the tire is cold, especialy before long distance travel. Great gift for father's day. ACCURATE : Our 10-100PSI tire pressure gauge passes the specified test and calibrated to ANSI B40.1 Grade B (2%) accuracy standard. You can get a precise tire pressure for your tires and decide to inflate or release the gas, without driving to gas station or garage. For sedan, 28-35PSI is perfect. EASY TO OPERATE: the air bleeder button, turn on the tire valve cap, insert the tire pressure air chuck tip, read the tire pressure from 1-5/8 inch dial after the pointer stop moving. You also can get the tire pressure after taking off the air chuck tip from the tire due to the pressure holding function. No battery needed. PREMIUM QUALITY AND FITMENT TYPE: Our mechanical tire air checker adopts premium gray plastic plated zinc alloy, 2 inch stem, 1-5/8 inch dial, very small. Attached free plastic storage case for easy store. 10-100PSI 0.5-7.5KG/c㎡ is perfect for car, suv, rv, atv, bike (with schrader valve) or motorcycle. The tire pressure gauge is your vehicle's indispensable companion. colour:black Material:Metal + plastic size:10*4.8*2.3cm Package Contents: 1*Tire Pressure Gauge 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.