If you click Here ,you can visit my store,there are other toilet accessories. Item will be senting with a installation manual,very easy job to do,changes over in minutes. Geberit Impuls250 toilet cistern dual flush valve / for two-piece toilet Fit two-piece toilet Overflow pipe height - adjustable Adjustable flush volume depending on the amount of water in the cistern With diameter 38mm "Half Moon" button (button will lock the cistern lid) 2" outlet wels rating na If you need a lots,contact me,I will give you a quantity discount.