These oil level indicators overcome all limitations of monitoring oil level within gearboxes with dipstick/Oil sight window. The oil level indicator provides a CLEAR ON LINE VISUAL INDICATION of oil level in gear boxes. The product has to be installed in existing drain of gear box and HI/LO levels have to be marked with reference to HI/LO of dip stick/oil sight window. The indicator has a drain plug. Hence old oil can be drained out without removing indicator. These oil indicators are available in tube length up to 1.0 mts in both Aluminum/SS base.