3 Inch Duct Connector, HG Power 75mm Plastic Straight Pipe Flange for 3" Ducting Pipes Hoses Heating Cooling HVAC Ventilation Use, Black

Solve my connection issues for the bathroom fan that goes through the roof.

Perfect fit on my portable diesel heater air intake port. This allows me to connect a 5” insulated vent hose to help draw in warmer air.

Use this for an exhaust vent out of drywall and it worked perfectly. Gives it an overall clean look and blends in well with the wall

I bought this to use as a finishing collar over a 4 inch pipe, going through a wall. Unfortunately, this fits inside the pipe, not around (or over) the pipe. None the less, it’s well made, plastic and of good quality. I’m going to order the 5” and cut it down if need be.

Used to add a thein baffle to my HF dust collector. It's a perfect fit. While the material is a bit thin, it won't be under any stress so no concerns about it breaking/cracking.

Perfect for a 6" connection.

Just what I needed for a project. It's a literally a piece of black plastic so just make sure that the dimensions are right for what you're doing.

It actually fit in screwed into my plenum, for a 3 inch duct into the garage. I have really no complaints. It already was drilled for three holes, but when you screw something like this into a galvanized sheet metal plenum three is not enough. It was not a problem, I just put three self-tapping screws. After that with a flexible ducked and a screw down clamp it worked fine. I did this just to add some [just a little] home furnace heat to my [actually heated] garage. I just didn't want the garage heater kicking off and on during the coldest nights in the winter. I'm hoping a 3 in heat duct will add enough. Anyway the product was perfect for this.