Repa Market 4 to 4 Inch (100 mm) WYE Shape 45° Duct Splitter, Galvanized Steel 3-Way Vent Connector for Exhaust Fan and Dryer, Round Metal Ventilation Pipe Joint for Indoor and Outdoor HVAC Systems

It appears to be good quality! I ran 2 bathroom fans into this y pipe and then out of one exterior vent. It’s preforms nice and helps me keep the smell and noise down in the bathroom with out having to run 2 separate ducts and vents

The unit did as exactly as needed to plumb two separate vent lines into one vent hole.

Professional handyman here. I know quality materials when I see them. This thing is the highest quality duct piece I've come across!Heavier-gauge metal than I'm used to seeing (no, I'm not talking about what you'll find at the Orange or the Blue Behemoths, that stuff is so thin it's not even worth consideration). Solidly-built joints -- good spot-welds along the Y joints, tight seams that are both crimped AND stitch-welded. The double clamp-retention shoulders are better than most. I can't get it to flex, much less crush.The thing that really sets this apart from the rest is the mastic spread across all seams and joints. What other fitting have you found that comes pre-sealed with mastic?!? That's usually something I have to do on site. And it's not all globby or sloppy. It's even painted the same color as the fitting! WHO DOES THAT??!!??Yeah, okay, so it's a duct fitting. Nothing to get excited about. I get it. But it's rare to come across quality like this any more.

Sturdy product worked well.

Husband loved it for some project about bathroom exhaust fans. Fast delivery.