This Fleetguard FS1007 is a replacement Fuel and Water Separator thatseparates water from the fuel and removes significant contaminants while offering superior filtration levels than the FASS FS-1007 Water Separator. The Fleetguard FS1007 Fuel/Water Separator is a High-Efficiency Fuel and Water Separator containing the patented Stratapore Filter Media. This diesel fuel water separator filter is a Spin On diesel fuel filter with a 10 Micron Filtration rating. This diesel water separator filter offers a finer filtration medium to remove water from your diesel fuel. The water removal capability of this premium quality filter helps to ensure the longevity of your entire fuel injection system and reduce bacteria growth.