The Twist2Lock™ Fluid Level Indicator (FLI) product line is ideally suited for a wide range of engine, transmission and other applications.
The patented locking cap and assembly process offer increased accuracy of fluid level, leading to greater powertrain efficiency and performance.  Fluid Level Indicators are manufactured as a complete system.  A complete assembly includes a tube, locking cap and indicator as required.  Also available is a lighter duty product called Push2Seal™™.