5-50 PSI, Slime Pencil Tire Gauge, Provide A Simple Way To Ensure Your Tires Stay Properly Inflated, Convenient Carrying Clip, Ideal For Measuring Low Pressure Inflation, Properly Inflated Tires Saves Money On Gas & Maintenance, Optimal Pressure Limits Tread Wear & Improves Gas Mileage, For All Tires.