- fits virtually all 1 1/2" leaver operated cisterns - long lasting butterfly diaphragm rapid height adjustment- fully adjustable from 7.5" - 9.5" - retrofits other syphons- comes with a clip-in adapter adjustable full flush - infinitely adjustable flush volumes- the only syphon to feature variable part flush - optimised flushing dynamics allows easy flush activation- twin flow performance cap - anti-turbulence outlet- optimises and increases flow