Professional Dual Gauge Leakdown Tester - Diagnose bad rings, leaky exhaust or intake valve, or gasket leaks. Dual Gauges in a quality anodized billet aluminum body allow for precise calibration and easy reading. Includes adjustable left-hand gauge, precision regulator, easy to read right hand gauge, 14mm hose end, and instructions. Limited 90 day manufacturer's warranty. Made in the USA.