CSR Performance Products Pro Series Tire Gauges are designed and precision engineered for today's high-tech, sophisticated, professional or sportsman, racers who demand every advantage for consistency in reaction and elapsed times. The large 3'' face makes accurate readings from the dial easy. The white background dial has black graduations in 1/8 lb increments across the 0-15 lb range, 270° arc of calibration. Accuracy to within plus or minus .5% of the entire span, as well as consistency, reliability and a long service life is achieved through a unique pressure element diaphragm within the all brass polished chrome finished case. It also features a polycarbonate lens and a complete stainless steel air hose assembly for mechanical protection and long life. Each tire gauge is supplied with an unbreakable, high density, polyethylene carry case.