Thanks Capt. Bob for posting the pic, pretty neat to see an ad from the 70's. I ended up finding them at a marine surplus near us. They are 7/8" 60 degree round base. Ended up getting all 8 of them and the "T" fittings for the upper part of the rail in all stainless. Most of them were clearanced out for about $3....thank goodness. Once we clean the rail up it will look like new.