The Stepseal® K, comes closest in satisfying the ideal demands of a dynamic seal. That is, no leakage under all dynamic conditions and completely leaktight when the system is static. In use for several decades, this seal remains a technically outstanding design. The single-acting sealing element is made of high-grade PTFE materials with superior sliding and wear resistance properties. A full range of sizes are offered to suit all MIL-G-5514F and Trelleborg Sealing Solutions standards using an O-Ring as the energizing element. Available in Turcon® or Zurcon® materials.