Sloan Part 5306058 F-3 (1-1/2") Red Friction Ring

Sloan OEM part. 1-1/2" diameter red friction ring used together with F-5 black slip joint gasket in spud coupling at the bottom of Regal, Royal, Sloan (house brand), and G2 (Optima) water closet flushometers where they join the plumbing fixture.