Trident Marine's "constant torque" hose clamp is a very high quality product that is delivered with a three year warranty. This hose clamp is made out of stainless steel and its distinguishing feature is that it maintains a constant pressure around the underlying material. Even if the material expands or shrinks the hose clamp will keep a tight grip of the material. Trident Marine's "constant torque" hose clamp is therefore highly recommeded for exhaust hoses and fuel fittings.
In addition to Trident Marine's "constant torque" hose clamps, you can also find standard hose clamps of different sizes in the page below.