48 mm Inside Diameter of Hole in Tank Lid Toilet Tank Lid Dual Flush Top Button 48mm Button, Remove & Measure Button Hole. 48 mm Dual Flush Top of Tank Lid Button Flush Any

NuFlush Toilet Tank Lid Dual Flush Top Button, Chromed ABS. Fits 48 mm Inside Diameter of Hole in Tank Lid. Button Fits the inside diameter of the Button Hole 48mm. Dual flush button flush 1/2 flush with smaller Button and Full Flush with Larger part of Button.