Actual appearance may vary to that shown above.

Metric Duct Adapters

Made from heavy-gauge, galvanized steel using a long-tapered design to minimize air resistance. Pre-crimped on the larger end for fast and simple installations.
As low as $21.26

Industrial Grade Material Handling Ductwork

Every shop owner knows the frustration of struggling with a tool connection, only to find that you're trying to mix inches with millimeters. Oneida Air Systems offers these convenient adapter fittings that are constructed from heavy-gauge, galvanized steel and are pre-crimped on the imperial end for simple installation into existing ductwork layouts. The raw (uncrimped) end is designed to slip over the metric sized dust collection ports of imported tools, and features a long-tapered design that minimizes air resistance.

Crimping Duct Reducers

Ductwork TypeStandard
Connection TypeMale / Female
Primary Build MaterialsGalvanized Steel
Thickness24 Gauge
WeldingSpot Welded
Static Resistance RatingConductive (Metal)
Country of ManufactureUnited States
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Frequently Asked Questions
What's the best way to apply foil tape on ductwork?

We've heard from many customers who've had great success using a simple Wallpaper Roller to smooth out their foil tape, giving a very smooth, clean look on your ducting. The roller helps smooth out air bubbles and crinkled marks while making it easier to get those hard to reach places on hanging ductwork.

We do not carry this product but it can be found easily at your local hardware store or home renovation outlet.

  California Residents: Please visit for information regarding Proposition 65 for our products.

Oneida Air Systems (OAS) is not responsible for typographical errors, omissions, or other clerical errors that may occur and makes every effort to provide the most detailed and accurate information available regarding our products. If you encounter incorrect information, please contact us. OAS reserves the right to restrict quantities and correct prices when necessary.