More durable, fix to tank in a strong way 
Suitable for tank dia of:
5in(TANK DIA: 127mm)
6in(TANK DIA:152mm)
7in(TANK DIA:178mm)
7.5in(TANK DIA: 190mm)
8in(TANK DIA:203mm)
8.5in(TANK DIA:215mm)
Customization are welcome.