4pcs /Set Vehicle Tire Valve Caps High Precision Tire Pressure Monitoring Warning Cap

1. Material: plastic + alloy
2. Transparent window design, real-time display of tire pressure
3. Fine thread to ensure no air leakage with the valve
4. Stainless steel exterior plating, not easy to wear and rust
5. Compact size, exquisite appearance
6. Size: 24 x 8mm
7. Weight: 5.5g/pc

Instructions for use:
1. Normal: in the standard tire pressure, the transparent window should be green, the vehicle normal driving
2. Warning: tire pressure is slightly lower than the standard about 10 percent, the transparent window is yellowish green, should be inflated in time
3. Dangerous: tire pressure is lower than about 25 percent of the standard, the transparent window should be yellow, should be immediately checked, inflated