Cat Door Extension – Easy Fix for Raised Doors or Thick Walls

This 3D printable cat door extension is the perfect solution for installations where the door or wall is too thick or elevated for standard pet doors. Designed to align seamlessly with popular cat door models, it extends the tunnel, making sure your feline friend gets through comfortably and safely.

• Perfect Fit Extension – Designed to match the profile of standard cat doors for a clean, snug fit.
• No More Gaps – Helps cover raised thresholds or thick wall installations, preventing drafts and unwanted critters from sneaking in.
• Modular & Scalable – Stack multiple extensions if needed. Can be resized or remixed to suit custom setups.
• Fast, Support-Free Print – Prints cleanly with no supports, using basic print settings.

Ideal for homeowners, renters, or pet lovers looking for a simple, practical fix without buying a new door unit.

Material: PLA or PETG recommended for indoor or semi-outdoor use
Print Settings: 0.2 mm layer height, 3+ walls for durability
Supports: Not required
Installation: Slides into place with compatible cat door frames