1-26 Dimension Needed

The trailer configuration for our club's 1-26 uses a steel tube that is
passed through the aft wing attach recepticals. This tube keeps the
fuse stable on the trailer. Anyone know off hand what the largest "off
the shelf" diameter tubing will go through that aft wing pass through?
No, I wasn't the one who lost it.. :-) But we do need to buy another
piece to replace it.

Thanks,

Mark

reply to (as the "reply to" is bogus