The absolute best hose clamps are the Mubea spring clamps. They come in different diameters for all applications, fuel to radiator hoses.
They are "constant tension" clamp vs. a "constant diameter" clamp. Spring clamps are constant tension and provide the best sealing. They sell to the OEM companies.
View attachment 1714708233
http://www.mubea.com/en/products-te...pring-band-clamps/standard-spring-band-clamp/