I enjoy these for working out because I hate wires, and these are waterproof. The problem is they advertise them for swimming but the tips themselves are absolute garbage. I would like to try something like my tri flanges or even foamies and see if I can actually get something to hold a seal underwater.
Anyway, they would have to be ~4.8mm wide and the extension that they slide over is 4.7mm long. I don't mind doing a little modding, but I don't see anything close in my limited collection. Any ideas?