12pcs Car tire Pressure Monitor Valve stem Cap Sensor Indicator, 2.4Bar 36PSI Pressure Monitor Tire Valve Stem Caps with 3-Color Eye Alert for Cars, Motorcycles, Bicycles.

Specifications: Diameter:10mm Length:23mm Easy installation:they are very simple to install just like the typical caps. High Precision. Top quality materials: Copper Core Tire Pressure Indicator Caps. Package Contents: 12pcs Valve stem Cap Sensor Indicators. Warm Notice: It would be better to remove the air caps when you wash your cars. When removing a cap. make sure that you do not lose the black washer. They are inclined to fall out and are very difficult to find again. It is advisable to remove them before your car is serviced at a garage.