These need to be epoxied onto the ends of 1/2" Loc-Line coolant hose to make flexible mounts. It's the same line GoPro uses on there $50 clamp mount. You can make your own for $20-$30 at most. The line can be made to any length but 1' long is perfect for most uses. Don't use 1/4" loc-line it's not stiff enough (I made that mistake already).Print solid, then use plenty of epoxy (I highly recommend J-B Weld or J-B Quick). Just don't skimp out on the epoxy, put plenty.