American Standard replacement - specific models only CHECK YOUR MODEL NUMBER FIRST: every American Standard toilet has a tank model marking inside of the tank. Verify that this lid is compatible. Reliable performance Lid measures: 8.7 L x 15.75 W x 1.89 H inches Compatible with toilet tank models: 4000.004 (1.6 gpf/6.0 Lpf); 4000.104 (1.28 gpf/4.8 Lpf); 4000.107 (1.28 gpf/4.8 Lpf)