Noise Reduction Clamp 4-Inch, Duct Coupler with Stainless Steel Clamps, Flexible Rubber Coupling for Inline Fans and Carbon Filters in Growing and HVAC

Not sure on the noise reduction portion but its a solid clamp and works well connecting my exhaust fan and the charcoal filter. been sitting solid for a few months now and unless the fan is running at 80% or higher you don't hear anything in the room or while walking past it. It doesn't obstruct the airflow and I feel like its pretty durable and will outlast my filter.

A MUST have to connect filter and fan!! Never again will I use duct tape!!! Took forever to get the already sealed tape off my filter/fan. Clamp was easy to install & fits like a glove. And it definitely reduces noise! It's not going to silence the fan; But I can definitely tell a "significant" difference! Can turn the fan up higher before hearing it as much, and even then it's still quieter than before.

Superior product, installs easily, holds well. I originally bought just two for installing the fan itself, but liked using them so much I bought three more to simplify other joins in the welding exhaust ducting I was constructing

Reduce noise greatly

I got this for a 4" exhaust fan in a small grow box and it works great. I have it in between the fan and a carbon filter. The rubber is very thick and does a great job of reducing noise from vibrations of the fan. The clamps that come with it are solid and keep a tight seal on the fan and filter. All of their products are fairly priced and this is no exception. Quality product at a great price makes this a must have. Nothing to dislike about this product whatsoever.

High quality and connects my range hood 6" outlet and Vivosun carbon filter perfectly. No rubber odor is a plus.

A massive improvement over the tape. Must have addition to any AC infinity system. Anyone can install.

Perfect method of joining the carbon filter and inline fan together. Docking a star because it should really just come with the fan/filter combo instead of being a separate purchase.

Sehr gut verarbeitet, und passt genau

At first glance this may seem expensive. I bought two to mount my inline duct fan - same brand S6. These made the install simple as they slip along the duct allowing the fan to be inserted in the gap. Then they both slide back to engage with the fan before tightening the supplied clamps. The fan didn’t require any other support or fixings and the rubber deadens any vibration. There was no noise from this installation other than air movement based on how much air was moved. See my review of the S6 fan which is excellent. Final thought - the presentation in terms of the packaging was excellent.

Sin ruido del filtro al extractor

Used to connect the ventilation hose in my sailing boat to the inlet blower onboard. Excellent fit. Highly recommend it. Great value for money.

Excelente