Hey Dave,
My FX-ONE has Spectra trap wires and they're exposed to the sun everyday it's sunny. I keep thinking about changing them, and in fact I have a new set ready to go, but now it's been so long I want to see how long they'll last. So far it's been since 2005 and I sail a lot. I'll tell you when they finally let me down.

Matt, the most common size is 1X19 3/32"