I'm so ignorant, I don't even know what to call it. My 120G was aquired used, and has an "all glass" top that is in sections. It HAD a brown connector thingy that acts like an elbow and allows the lid to be raised and lowered and CONNECTED to the adjacent piece (which is not how it is right now. What a pain!). I happily bought more of the bendy stuff, but have NO IDEA how to get the old, dea, separated, glued on connector stuff OFF. Anybody know what to do? Thanks a bunch from me and all the denizens of my tank....