Double-acting O-Ring energized scraper with two O-Rings that has two functions: a) to scrape contaminants from the retracting piston rod to prevent soiling of the system and b) to hold back the residual oil film on the extending piston rod on the medium side. Trelleborg Excluder F is recommended for use in conjunction with Turcon® Stepseal® 2K or Zurcon® Rimseal. Very high resistance to hydraulic media.