See-through hinged doorMagnetic weatherproof seal4-way locking systemSleek, stylish, and economical. Set it for "Out-Only" mode to make sure she can leave the house, but strays can't get in; or "In-Only" if you need to go to bed before she returns from her nightly prowl. For use in a single glazed door or a standard door. NEW Extension Kit expands depth of cat door for wall installation. Provides 3/4" extra tunnel depth.Please click on "More Information" for size chart.Learn more about installing your pet door. Please select your connection speed to view the Staywell Pet Door Assembly Video: Broadband (300 kbps) or Dial-up (56 kbps)

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