Thank you!

We appreciate your interest in Dundas Jafine and will get back to you shortly


Metal Increaser And Decreaser

Dundas Jafine’s Aluminum Increaser and Decreaser are used to connect 3” – 4” ducts together. They are offered with either a 3” crimped end for increasing the duct size to a 4” or a 4” crimped that will allow you to decrease the duct size to 3” in diameter.



Product Code Product Description Size Pack Qty Packaging Type
RA34 Metal Increaser 3" - 4" 12 Bulk
RA43 Metal Decreaser 4" - 3" 12 Bulk

Other Recommended Products


Download product photos

Select the photos you would like to download