I am buying three hourglass rollers for the keel of my boat. The keel does
not have a kickout where I can use a regular spool roller. I measured a
couple of places where I want to put the rollers, and there is a different
angle. I take that back, the front receiving roller will be a spool roller,
as at that point of the keel, there's an aluminum cover that kicks out about
1.5". The rest is just a vee'd seam with a strip of joining metal.

Do the hourglass rollers come in a lot of angles? There is a large
difference in the prices due to different materials. Is the differences
softness, UV durability, what?

BTW, thanks for the West Marine suggestion. That's about a block from my
doctor's office, and I'll be going there very soon.

Steve