2" Non Applied Jamb Extension Shipped KD (Knocked Down) will increase the jamb depth on your  wood or polyurethane stationary octagon window up to an overall wall thickness of 6-11/16".

Available For All Window Units!

Preview Item Shown Is For A Poly Stationary Unit. Also Shown In Product Images Are Expanded Views Of Poly Stationary And Wood Stationary Jamb Extensions.

When Ordering Jamb Extensions The Frame Style Is Designated By The Exterior Of The Window.

 Please Specify Window Frame Style If Window Unit Is Not Included On Your Order:

• Wood
• Poly

Please Specify Window Designation As Frames Are Different Thickness:

• Stationary
• Venting