4 Inch Draft Blocker Backflow Damper Backflow Preventer

4-Inch Draft Blocker Backflow Damper Duct Draft Stopper Unidirectional Airflow Duct Insert Backflow Preventer Inline Fan Vent Deflector
Although the item is basically unused,
there may be small scratches on the packaging and the main unit.
This is a home storage item, so it is not new like in a store.
Please refrain from purchasing if you are looking for perfection.
Also, we have posted photos of the actual item, so some parts or accessories may be missing. Please check the contents carefully and purchase with your understanding. (If you have questions about missing parts, we can add more photos.)
Also, we are not very knowledgeable about the items we list, so we may not be able to answer many questions.
Please research it yourself.

Shipping will be simple.
It may be shipped out of the case. (If you want the box, please contact us before purchasing. Some items cannot be shipped with the box.)
Basically opened.
No operation check.
In the unlikely event of a malfunction, operational defect, or problem, please provide detailed information before leaving a review and contact us. (We have recently received bad reviews for this. We understand bad reviews regarding our response, but we are having trouble because customers do not contact us about defects in the product itself, even though we have stated this.)

[Other]
Non-smoker. We have a cat, but we generally work in a room without the cat.
Shipping is generally anonymous, but we may change the shipping method without notice.
If you have any concerns, please feel free to ask questions.