The FH6 Series 15 GPM Return Line Filter Head from Buyers Products keeps contaminants as small as 10 microns from returning to your hydraulic reservoir. This filter head is rated up to 15 GPM for return line flow and can take up to 200 PSI of working pressure, with a 25 PSI bypass. It has two gauge ports. Choose either a 10 or 25 micron filter element.