Our SY-121, Spring Band hose clamp are the best choice for the hose-spigot joints which are exposed to the temperature fluctuation environment. While it installed, the clamp will re-tensioning automatically in an extended period of time. It is mainly used in automobiles, tractors, ships, gasoline engine, and so on each kind of mechanical device for oil, gas, hydraulic hose connector, various types of rubber tube interface must join parts fastening. Compare to other similar product in the market, our SY-121 can be used without tool, the user can easily install and disassemble.