These air supply dampers are hand made in Denver, Colorado, USA. We make these out of black acrylic material to help disguise them inside the duct work. These dampers offer an on/off solution for our wood or acrylic vent covers that we offer in our other listings.

If you want to order, please message first, as these are custom made to order, and will only work with our grilles. There is a little rectangle cutout where the thumb adjustment wheel is located to turn on or off. These can be easily be attached with just a bit of super glue or hot glue. We can also provide brackets that screw on if desired. Vent covers should be stained or painted before mounting these dampers to the back side of the cover. The actual damper box size for a 4" x 10" duct opening is 3 3/4" x 9 1/2" to allow for some wiggle room. The vent cover size you would need for 4” x 10” opening would be a 6" x 12". If you need to order both a cover and a damper box, please reach out first so that we can do it all as one custom order instead of multiple orders.

Please reach out with any questions before ordering. If you need one for a bigger or smaller duct opening, just let us know what size you would need, and we can send you a quote. Thanks for your interest in our shop!