4297159 Sight Gauge for Cummins Engine K19 K38 K50 QSK NT14 NT855,Counted as an essential daily inspection component, the 4297159 sight gauge is universally applicable for multiple Cummins heavy-duty engine series including K19, K38, K50, QSK, NT14 and NT855. Featuring high-transparency, pressure-resistant glass and precision calibration scale, it allows operators to visually check oil level, liquid status and system pressure at a glance. Wear-resistant and aging-proof, it maintains clear display effect for years. This simple but reliable part simplifies routine engine maintenance and avoids hidden risks caused by abnormal liquid levels.