There are a few different types of bobberstops -- the kind justme described, the flourescent thread on a little tube that you thread on your line, remove the tube and tighten the thread and the little rubber one that you slide on (I don't think this one stays in place real well). The thread works best on my rods. I've tried the plastic bobberstops, but if the eyes on your rod are small, they want to hang up and not move through smoothly.
Vonna
Yes, I fish like a girl. If you tried a little harder, you could too!!