Our Nitrophyl float for the Stromberg carburetors has been so successful that we decided to apply the same thinking to the SU float. Nitrophyl is a thoroughly modern material thatÕs impervious to fuel additives and wonÕt crack or absorb fuel. A center tube and end plates made from brass provide wear surfaces. Gone are the problems with stress cracks and solder joints! These fit all Jaguars with SU H6, HD6 and HD8 carburetors and a host of other British cars. 2" approx. O.D., 1-1/2" tall with 1/4" hole.