The Double Delta® is a double-acting PTFE sealing element which is energized by an elastomer O-Ring. The Double Delta® seal can be fitted in existing O-Ring grooves (US standard AS 568 A, MIL-P-5514) and it demonstrates good friction properties, stick-slip-free starting and excellent dry running. The Double Delta® is used in light and medium duty industrial hydraulics. Available in Turcon® or Zurcon® materials. The O-Ring is not included with this item.