The listing, NEAT ---> LQQK . . . tire pressure MONITORING valve caps has ended.
this is such an awesome product! especially for those who are not so "car" savvy as others and don't pay too much attention to when the air in our tires are low.
driving with low pressure tires not only ruins the life of tires but it also decreases gas mileage.
these valve caps change colors when the pressure level changes.
green means safe--pressure is ok
yellow means caution--check tire pressure
red means danger--check tire
ships free in usa