The HFA9 Series 26 GPM In-Tank Filter from Buyers Products blocks contaminants as small as 10 microns from returning to your hydraulic reservoir. Located inside the reservoir, the filter assembly saves space by not having to be installed externally, and can operate in temperatures from -22- F to 212- F. It can handle up to 100 PSI working pressure and has a 25 PSI bypass. The assembly comes with the filter head and either a 10 or 25 micron filter element. The 25 micron element allows an increased flow rate of up to 40 GPM.