14 Pcs Radiator Pressure Tester and Vacuum Type Cooling System Kit Tester helps detect internal and external leaks Perfect for head gasket failure detection (which side of block or which cylinder leaks) Features: Thumb-operated relief valve for quick and easy pressure release and self-locking quick-disconnecting components. For testing automotive pressurized cooling systems up to 35 PSI High volume pump capacity reduces strokes required to pressurize cooling systems Include: Thermometer, 4 Chromed steel cap adapters, 8 Anodized aluminum cap adapters, Carrying Case