Zooming in and slightly enhancing one of the photos taken by Adam Savage, I believe I can clearly see 25" stamped on the clamp , it's hard to make out what is written before it though, so it could be 1/2 5" but that makes less sense than say 1.25"

Mercifull liked this
    Northwest Ghostbusters?

    Any one else going to be at Norwescon next week?

    RGB did have a lot of decent writers for a cartoon[…]

    So, I opened the pack again the other day to do so[…]

    Ill try anything, hasbro support wants a picture o[…]