The Model 40530WA is a water sensing and particulate removing filter with 30 micron cellulose media which is recommended for gasoline and heavier distillates such as diesel fuel and fuel oils. The 40530WA utilizes a standard 1 3/8 -12UNF mounting thread 1 inch flow required for most high flow agricultural applications. The 40530WA is a water sensing and particulate removing spin-on filters designed for use on fuel dispensers, power pumps, and various agricultural, as well as commercial and industrial applications. It utilizes an epoxy coated interior shell to eliminate oxidation which can cause pin-hole leaks from the inside. PetroClear filters are not to be used with aviation fuels. The 40530WA is not recommended for use with alcohol blended gasoline. Phase separation will not be detected should it occur. There are 12 filters per case.