HCL Fasteners Herbie Clip Double Grip Hose Clamp, Size H 0.71"-0.80", Black, 10-Pack

These worked for my aquarium filter hose application, but compared to a bundle tie, like the bundle ties better. These tended to flex to much on lining up and tightening. Bought these for reuse if removal of my hoses were required, but, would rather have the security and reliability of single use bundle ties.

Have had the clips on my tank 2 years running, no issues at all. Remember that the size is the O. D. of the clamps, they don't correspond to the tube/hose size.