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GAF Master Flow 7 in. Starting Collar with Damper - 12LSCD700BG - Pack of 8

The Master Flow 7 in. Starting Collar can be used to transition from a flat surface such as a lined or duct board plenum to round pipe or insulated flexible ducts. Can also be attached to metal surfaces. Made of galvanized steel, this starting collar is made for durability. The 2 in. space between the bead and flange provides you with plenty of space for securing an insulated flexible duct.

  • Made of galvanized steel
  • Helps transition from lined or duct board plenums to round pipes or insulated, flexible ducts
  • Can be used with unlined, metal plenums
  • 2 in. between bead and flange allow space for securing insulated flexible duct
  • Seal seams with code-approved mastic, sealant or duct tape (sold separately)


Refund Policy:

Enjoy peace of mind with Big Blue Products' 30-day refund policy. Contact us within 30 days of purchase for returns or exchanges under the following conditions:

  • In case of receiving the wrong item or a defective product (excluding man-made damage), please provide a photo as proof. Upon confirmation, we will either accept the return or provide a replacement.
  • If the item is in good condition and matches the description, the buyer is responsible for return shipping costs.

Contact Us:

We can be contacted at any time through eBay messages if you have any questions, comments, or product requests. We will respond to you within 24 hours and do our best to help you out! We encourage our customers to contact us with any questions or concerns! We'd like to be sure you are completely satisfied with your purchase.

Big Blue Products, inc 130 Eileen Way Syosset, NY 11791 United States