|Brand||Master Flow||Master Flow||Master Flow||Master Flow|
|Name||10 in. Starting Collar Take Off||12 in. Starting Collar Take Off||14 in. Starting Collar Take Off - Snap Together||16 in. Starting Collar|
|View Product||View Product||View Product||View Product|
When I got mine it was shipped to the store as I requested. Now it said it was out of stock on line. Not sure if Master flow stopped making them or that they are behind in supplying them. Don't no what else to tell you, you might have to keep checking back to see if they come back in stock.
The "external collar" adjusts down from the fiber board thickness to the metal duct thickness. Seal it up good as always and it works great.