Reliable, cost effective clamp.  Made from 316 annealed stainless steel*.  Rolled edges to eliminate the risk of damage to hose.  Extra wide threads on the band are stamped leaving an unperforated band smooth on the inside.  Band and screw threads are properly pitched rendering the clamp virtually immune to vibration back-off.  Pre-lubricated drive gear for smooth operation.  We always recommend double hose clamping.  So you should install 4 clamps per hose connection (2 on each side). 

*316 annealed stainless steel is far more corrosion resistant in the marine environment when compared to 304 or 302 commonly used in other brand worm gears.