The 100 GPM Return Line Filter from Buyers Products blocks contaminants as small as 10 microns from returning to your hydraulic reservoir. The dual filter design is ideal for high flow volume applications. It is rated up to 100 GPM for return line flow and can take up to 150 PSI of working pressure, with your choice of a 15 or 25 PSI bypass. The assembly comes with the filter head and two 10 or 25 micron filter elements.