Rubber tip on the brake rod

Dr. diff can keep them, 3 dollar part with $13.65

So $16.65 for a piece of rubber that fits on the tip of your pinky and that's if USPS doesn't lose it like lose everything else

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Its no secret that shipping costs nowadays are pretty outrageous, but even with the inflated shipping, its really not that expensive, especially to get a part that was made to fit and function properly. I also need one of these for my brake changeover, and Ill be buying a proper one rather than juryrigging some hose just to save a few bucks. Piece of mind is worth it :)