if it's .25", then it is -10 (6.4mm) or the next size up is -12 (7.1mm) rigging. I don't think that I have ever seen hollow rod rigging. Seems like I read somewhere that "standard" mechanical cutters could do up to -17, but don't quote me.

Raced on a couple of boats w/rod, but I quit slow boats a while back (~6 yrs). I can't remember what any of them had, but seems like the Soverel and First class 10 had -10 and the Hunter 45 had -10 also...