Window Cat Door Insert bridge Tunnel attachments are installed into

Tunnel attachments are installed into an 18" height polycarbonate sheet

included foam weather stripping

37-inch wide condos

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Window Cat Door Insert bridge Tunnel attachments are installed intoSized to Perfectly Fit Your Window, Easy Installation, & Secure Design! Give your cat safe, convenient access to their catio with a custom fit Habitat Haven Cat Door Window Insert. Designed to sit securely inside your existing window tracks, each insert is made to order for a clean fit, easy installation, and simple removability when needed. Choose the insert style that matches your window: Horizontal Window Insert: Designed for windows that open and