Description Universal 2″ Single Flush Valve by NuFlushFor Two-Piece Toilets with Top Button • Fits Caroma Adelaide Cube toilet tanks• 2″ single flush valve with classic pullback mechanism• Adjustable height top-button flush actuator• Fits lid holes: 16 mm – 50 mm diameter• Adjustable flush volume slider: 2L – 4.5L• Complete single-flush valve and button kit for two-piece toilets