Never be unsure if your car tires are looking low by carrying one of these pencil-style tire pressure gauges in your car. The gauge measures 10 to 50 PSI for an accurate reading which will help you fill your tires with the correct amount of air for better tire performance.Each of the individually packaged tire gauges comes with four valve caps in case you lose any. With a total of 72 tire pressure gauges per case your customers will appreciate being able to pick up one to keep in their car.