Duct Reducter 6 to 4 Air Ducting Reducer Increaser Air Duct Adapter or Round Metal Pipe Reducer for Bathroom Kitchen Ventilation Systems

This duct reducer was a heavy duty unit. I was surprisingly pleased with the thickness of the metal and its construction..

Exact size. Does not slide into fan housing duct. Although this doesn't work for me, the product is metal and good quality.

Fit good

Amazon should put items by the door and not on the steps

Its a good heavy duty reducer for hvac. Im not crazy about the price but taking that out of the equation this reducer is sturdy.

Awesome product, couldn't find in stores. Worked great

I can confirm this fitting is off by 3/16 of an inch making it unusable for my vent fan. I'll need to return it

For anyone trying to reduce the input and/or output of an 8" AC Infinity fan, these fit perfectly over the fan inlet and outlet. They fit so good you could probably get away without a tape seal. This was hard to tell if they would work, so I took a chance and these are cheaper than the AC Infinity ones that have mixed reviews on even fitting.

well made

Fit perfectly, used it for fixing a upright air Conditioner

perrfect

It does what it's supposed to do, it's kinda hard to screw this up.

Good quality product. Fits correctly and a fraction of the cost of a big box hardware store.