The Liberty Custom Pet Door for Horizontal Sliding Windows offers a custom-tailored, weather-tight pet entrance designed specifically for your window's exact measurements. Built with single-pane safety glass and durable frame materials, it provides seamless outdoor access for your pet without requiring permanent alterations.

Custom Built to Your Measurements
Engineered to match your specific window dimensions, this insert installs into horizontal sliding window tracks without permanent structural modifications. The spring-loaded mechanism provides up to 3-1/2" of built-in height adjustment for a snug, draft-free seal.

Energy-Efficient Safety Glass
Constructed with durable single-pane safety glass, the insert preserves natural sunlight and outdoor visibility while keeping your home insulated against seasonal temperature extremes.

All-Weather Magnetic Flap
The clear vinyl pet flap remains flexible in temperatures ranging from 0°F to 120°F. Magnetic closure strips and weatherstripping maintain a tight seal against heavy winds and drafts, with adjustable magnet tension to suit your pet's needs.

Aluminum & Vinyl Frame Options
Available in clean white finishes with heavy-duty extruded aluminum or flexible vinyl frames. Aluminum models require window tracks at least 1" wide, while vinyl models fit tracks at least 1-1/2" wide.

Integrated Security Cover
Includes a sturdy locking cover that slides securely over the flap opening, giving you total access control and peace of mind when keeping your pets safely indoors.