Air Alert Tire Valve Cap.

Item comprises a set of 4 tyre pressure indicators packaged in a blister packwhich can be displayed on hanging bars. Tyre pressure guage is for tyre inflation rating of 32 psi. Correct tyre pressure saves money on fuel and reduces emissions as well as reducing excessive tyre wear These tyre guards indicate early warning of loss in tyre pressure. if tyre pressure is within normal range, the indication bar will be green, if tyre pressure loses up to 25%, the indication bar will be green and yellow. If more than 25% tyre pressure is lost the indication bar will be green, yellow and red Easy to install instructions Fits most universal valve caps We recommend greasing of the valve for ease of removal.