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Ideal Flexible Sash Window Insert
Ideal Flexible Flap Sash Window Insert for small to large dogs

Fits Openings From 23" to 50"
Single Pane Glass | Single Flexible Flap Door
Slide In Blocking Panel - Utility Rated - Four Pet Opening Sizes

Alternative Views:

Ideal Pet Products Authorized Retailer

Pricing starts at: $137.99
Complete pricing chart at bottom of this page

Availability:: Usually Ships in 3 to 5 Business Days

Select your Adjustment Range*:

Add Replacement Flaps*:

Description Installation Instructions

Ideal Flexible Flap Window Pet Doors

Single Pane Glass - Single Flap

Customer Favorite The Ideal Pet Flexible Flap Window Inserts are designed for both cats and dogs. All models are available only in white. These inserts have an approximate 5 inch adjustment range, allowing for the possibility of moving the unit from one window to another, as long as your window widths fall within the same given range. These units are designed to be inserted into the track that your window glides up and down in.

Make sure your channel or track is a t least 1" wide to accept this unit.

The sash window closes down to the unit, providing the stability. There are no locking mechanisms that come with these units, however, most customer will use a brace-bar or stick above the top window so that it cannot be opened.

Flexible vinyl flap with magnetic seal at base
Slide in plastic locking cover for pet opening
Both ends have spring loaded adjustment
Pet Opening is centered in unit
Safety tempered glass on either side

Views showing Locking Panel Cover with Pet Opening

Note: When selecting an adjustment range, make sure your overall width measurement falls comfortably within the selected range. The unit must contract more than your opening width to get the unit into the channel. Your channel width should be 1" wide to accept this unit. Call us if you would like assistance with your measurements or selection.

A Pet Ramp may also be something you are considering due to the fact that some windows are too high up for you pet to access comfortably and without danger. In these situations we recommend a pet ramp, we carry an excellent selection of ramps to fit nearly any situation and they come in many different shapes, sizes and colors.

How to
Replace Flaps
Need Flaps?

Ideal Flexible Flap
Window Pet Doors

This window unit has 2 adjustment pieces, one on each end
giving you the maximum fitting potential between different windows

flexible flap pet door used in the sash window insert
The pet door flap in these units has a metal strip along the bottom that aligns with magnets in frame. A locking slide in closing panel included. The pet door frame & Locking panel color will match selected panel color.
The adjustment ranges are the minimum & maximum that a unit will contract. Make sure you allow for the depth of your window channel when selecting a range. Call us for assistance: 608-781-7385
Pet Opening
Flap Size
Unit Height
Ranges Offered
5 x 7"
12 1/2"
(Starts at)
7 x 11 1/4"
16 9/16"
(Starts at)
10 1/2 x 15"
20 5/16"
33" -38"
Super Large
15 x 20"
45" -50"
*The small & medium size openings are the only models that is available in the 23-28" range
All Ideal Products returns incur a 20% restocking fee
Technical Specifications
All Window Sash Units have a spring-load adjuster on EACH end
Info below highlights only one end of unit

Flexible Flap Sash Window Pet Door Technical Information
Replacement Flaps

  • All Ideal Pet Product returns incur a 20% restocking fee

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