Fluidmaster float valves for toilet cisterns. The quite, reliable replacement for faulty, old fashioned mechanisms. Compact, efficient design fits todays 6 litre cisterns Works well with high or low water pressure no need to change seals Simple to install without special tools Fast refil, with an absolute shut off after every flush Last longer by working with water pressure, not against it Seals are easy to access and simple to change or replace Also available with 3/8" threaded shank Also available with a heavy duty brass shank which eliminates cross threading