Hale "Omni" Pet Door for Sash Windows

8 Fits securely in single or double-hung sash windows Dual-pane glass and double flaps ensure year-round energy efficiency Extruded aluminum frame available in four colors Lightweight flaps make it easy for pets of differing sizes to use Can be customized to fit window tracks as small as 1/2" We'll need more information to complete your order.  In your Order Confirmation email there is an Orange button with "Finish Your Order".  Click on it to enter to answer questions to finish your order. Thank you! NOTE:  Built-to-order, your custom order can take up to 8 weeks to build The Hale Omni Panel Pet Door is designed to fit in single or double-hung vertically-sliding windows. Featuring dual-pane glass and double vinyl flaps, these Omni doors are engineered to perform in severe climates, whether hot or cold. Not only will it accommodate both dogs and cats, they come in eleven different sizes to ensure that you get the perfect fit for your pets. Avoid cutting holes in doors or walls wit