DOES NOT replace missing caps! They fit perfectly in the caps that come with the switch, but are too big to fit on the joystick alone. I bought 4 packs because we have 2 switches and 1 switch was missing the caps. The one with the pegs fits perfectly and the one I mostly bought for STILL doesn't have the pegs because they were too big. I would put 1Star if I just bought them for my derailleur that needs caps. Damn