Durst Femoneg AM negative carrier, American version, for L1200 enlarger.  Clean all around. Masking blades move freely in both horizontal and vertical orientations.  Ball bearings on the rear of carrier, left and right, allow for smooth easy insertion of carrier into the L1200 enlarger. The two tensioning metal springs on the top are in very good condition and will ensure positive location and registration when carrier is inserted into the enlarger.