Husqvarna 46/48" Triple Bagger model H4648.  Fit my Husqvarna YT46LS lawn tractor.  I also have a second lower tube that would fit a deck with a narrower aperture, but I have no idea which decks/tractors that would be.

The flange on the larger one is cracked but works OK.  I covered it with duct tape to minimize leakage, but it could also be sealed closed with epoxy or similar, or mended with splice plates, etc.

I no longer have the mounting brackets (support assembly) that hold this unit on a tractor: you’ll have to source those elsewhere.  Support assembly part number 532 19 83-64, plus bolts.

The gasket the covers the gap between cover assembly (hood) and discharge chute is old and not as resilient as it once was.  Other than that and the cracked flange at the bottom of the chute, the unit is in very good condition.