The Oil Level Indicator (OLI) was developed in response to the need of maintenance professionals to gauge the oil level inside large tanks, gearboxes and reservoirs. ... Red and green level marker stickers are included with the OLI to mark upper and lower limits, or to designate running oil level and idle oil level.Being perfectly shaped and swift movement of our organization, we are instrumental in offering a qualitative range of Air Compressor Oil Level Indicator .Our provided Oil Level Indicator is manufactured using the latest technology, innovative machines and the finest raw material.