This ultra compact syphon fits virtually all 1 1/2″ inch lever operated cisterns. It’s easy to install and service with removable parts. The unique full and partial flush volume adjustability gives you full control over the water delivered to the pan. With rapid height adjustment, this is probably the only syphon you’ll ever need! Fluidmaster Pro Ultra Universal Dual Flush Syphon Adjustment 7.5 9.5 190Mm 240Mm, This Fluidmaster Pro Ultra Universal Dual Flush Syphon Is The Latest Innovative Product From Fluidmaster Who Have Been At The Forefront Of The Toilet Care Market By Providing High Quality Yet Easy To Use Products. Features, Ultra Compact Syphon Easy To Install Light Touch Activation Rapid Height Adjustment 7.5Inch To 9.5Inch Unique Full And Partial Flush Volume Adjustability Retrofits Other Syphons