"One man's fish is another man's poisson"
graphite rings that take up the space between the rod and the reel seat. you match the outside dia. of the arbor to the inside dia. of the reel seat. the arbors have to be reamed to fit the rod kinda like the cork handles. most reel seats have about 4 arbors spaced out under them. one at each of the far ends of the seat. hope this helps later chuck