Measures 14.25" from the base of the unit to the end of the tube. 0-90 OHMS. For REV Group class A motorhomes / RVs (American Coach, Holiday Rambler, Fleetwood, Monaco Coach). REV part number 10112042, Centroid number 01805085. RV Elite part number 08645562. Centroid fuel senders determine fuel level by measuring the capacitance between their metal inner and outer tubes. Capacitance increases as liquid replaces air between the tubes. No float is required. They are designed for non-conducting liquids only, diesel and gasoline with up to 10% ethanol. Pre-calibrated / pre-set at full (meaning it is ready to use right away once installed).