Mansfield 3.25-in Plastic Flush Valve Assembly for Use In 3.5 Gpf Alto-pro-fit Tanks in the Residential Toilet Flush Valves & Repair Parts department at Lowes.com
Champion 4 Upgrade Flush Valve for Two Piece Toilets - - Amazon.com
Toilet Flush Valves 2-Inch Dual Flush Valve Replacement Kit for 2-Piece Toilet Tank Compatible with TOTO THU435 THU224 Flush Valve - - Amazon.com