The Harmsco HC/170-.35 Hurricane Pleated Filter is a reverse osmosis pre-filtration system featuring a 105 GPM high flow capability that benefits from lower overall operating cost. Length: 30 3/4″, Diameter: 7-3/4″, Micron Rating: 0.35 micron, Surface Area: ~170 sq. ft., Max Temperature: 140°F, Max Flow rate: 150 gpm.