I have a bunch of Durst negative carriers. Can someone tell me for which enlarger they were made? They measure 5 1/16th x 7 1/16th for width and length. My guess is for one of the 8x10's. Not sure, though. They're heavy duty and well-built. My only complaint about these carriers is that the hole for the negative is a little smaller than I like. I have other negative carriers with holes that reveal more of the negative.