1. Used to observe the amount of oil remaining in the engine oil pan 2. Installation position: inside the engine oil dipstick hole 3. Material: plastic + stainless steel 4. OE: F81Z6750DA, 917-371. This is for reference only, please check carefully and confirm OE before purchasing. 5. Applicable models: - For E-350 1997-2003 - For E-450 1999-2003 - For E-550 2002-2003 - For ECONOLINE SUPER DUTY 1998-1999 - For EXCURSION 2000-2003 - For F-250 SUPER DUTY 1999-2003 - For F-350 SUPER DUTY 1999-2003 - For F-450 SUPER DUTY 1999-2003 - For F-550 SUPER DUTY 1999-2003