This is a parametrized pool nose pinch!We tested them and they work absolutely fine. Can be a little hard to find the transparent ones in the pool and I don't know how long they will last, but you can always print some more :)The scad file includes a 4x2 grid with different sizes nose clamps, so you can work out which one works best for you. Print a couple of clamps and find the right size and spring strength. You can change the spring strength by changing the diameter of the bridge.I printed them with PLA, and found that PLA is way to hard to be clamped on your nose. Coating the cushions with hot glue or applying some heat-shrink tubing makes them a lot more comfortable to wear.