Repair your leaking or running American Standard Champion 3, Kohler Class Five or Kohler Class Six toilets. The Korky universal 3 inch valve seal kit contains two premium, longest lasting seals to repair your champion, class five or class six flush valve. Proven longest lasting, the valve seal kit is backed by a 5 year warranty. Replaces: American Standard seal: 738651-0070A & Kohler Seal: GP1059291.