[FTC]: Parts Question

http://www.chiefdelphi.com/forums/attachment.php?attachmentid=11162&stc=1&d=1323211754

I was at a championship and this robot had a really impressive scissor lift. They drove the lift with a threaded rod on this bronze thing. I didn’t see this on the tetrix website, where can I get something like this?

screw drive2.jpg


screw drive2.jpg