2.4 bar car tire pressure monitoring tool kit anti-theft lockable tire valve stem caps indicator 4pcs/set

1.material: metal. size: 2.3 x 1cm. simply install on the air valve according the recognize color to display the pressure of the tire sing it makes the tire of your car more safe indication: green display = pressure normal yellow display = pressure warning red display = pressure dangerous compatible with: car tire standard tyre pressure:2.4bar=36psi 2.buyers may return the item(s) for a refund if they are not as described or with quality issues within 7 days from the day the item(s) were received.the buyer is required to afford the return cost, based on the condition of the item(s) received.