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Endura Flap Cat Door for Horizontal Sliding Windows

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  • Removable panel with built-in cat door fits into horizontal sliding window track
  • Durable, aluminum frame and pet door made to withstand extreme weather
  • Made with dual-pane, Low-E glass to improve energy efficiency 
  • Tool-free installation
  • Made in the USA. Free Shipping within the US
  • Custom height options are non-returnable and please allow 4 - 5 weeks for delivery
Flap Size Flap Dimension Step Over  Overall Panel Width Recommended
Pet Height*
Stock No
Small  6" w x 11" h 3" 11 1/4" 9" - 14" 07PPC28



Horizontal Sliding Window Door

1 horizontal sliding window door

locking cover

1 center post weather seal draft stopper

1 foam weather strip

1 installation instruction booklet

1 sliding door clamp lock


The Endura Flap Cat Door for Sliding Windows is made to fit into the existing track of your side-to-side sliding window. It installs tools-free with a spring-loaded design to safely secure into your sliding window track without any permanent alterations (perfect for renters!). The removable panel comes with a C-clamp lock, draft stopper, and weather stripping. It features dual-pane, Low-E glass that is UV and infrared resistant for maximum insulation value. The flexible flap is lined with adjustable magnets to resist heavy wind and extreme temperatures.

The panels have a 3" spring-loaded height adjustment, so if you have a 48" track, for example, the panel you choose will adjust from 46" - 49" inches. They are also custom height options if your track falls outside of those ranges.



  • Aluminum frame designed to fit into a window track width of at least 1" thick
  • Comes with a C-clamp lock, draft stopper and weather stripping for security and insulation
  • Dual-pane, Low-E glass allows natural light to enter while blocking out unwanted UV rays and infrared light
  • Flap withstands -40°F temperatures and stays sealed in 50mph winds
  • Magnetic sealing resists heavy winds/storms
  • Flap swings on a rod at the top, avoiding breakage
  • Includes a sturdy locking cover



  • Removable panel benefits all owners, especially renters!
  • Don't need to make any permanent alterations to window
  • Available in white, bronze, or brushed aluminum to match your window frame
  • Pets can enter and exit as they please
  • Locking cover prevents pets from leaving the house when you want to keep them inside
  • Made with durable, long-lasting materials
  • Built in the USA

Endura Flap® Pet Door Warranty

Endura Flap products have a lifetime warranty against defects in materials and workmanship under standard regular use. Damage caused by not using the product as intended, improper installation and chewing is not covered under this warranty.