Toilet Tank Flapper for Kohler & Sterling - Plumbing Parts by Danco
Fluidmaster 5403 Water-Saving Long Life Toilet Flapper for 3-Inch Flush Valves, Adjustable Solid Frame Design, Easy Install (Red) - Toilet Flappers - Amazon.com
Korky Kohler Rubber Hinge Toilet Flapper for 1-Pc. Toilet - Bliffert Lumber and Hardware
Toilet Flapper Replacement - iFixit Repair Guide
Nick the Fixer 3 Inch Toto Rubber Toilet Flapper Replacement - Toilet Valve and Flapper for G Max - Toilet Stopper Flapper with Chain and Hook - Easy Install Toilet Bowl Flapper Replacement - - Amazon.com