Whiskers & Windows Cat Door For Sliding Glass Door
The Whiskers and Windows cat door has an easy-to-push flap, making it ideal for timid and elderly cats
The rigid flap is tinted and lined with weather stripping for increased weather insulation
Before ordering your patio cat door panel insert, make sure you take the proper measurements of your sliding glass door and you pet to ensure the best fit
The flap of of the Whiskers and Windows cat door is tinted, but clear, which makes it easy for cats to use
The Whiskers and Windows Cat Door for Sliding Glass Doors comes in white or bronze to best match the aesthetic of your home.
The Whiskers and Windows cat door for sliding glass doors comes in size small and large
The Whiskers and Windows Cat Door for Sliding Glass Doors has a cat flap with an six by six inches opening
The Whiskers and Windows Cat Door for Sliding Glass doors come in white or bronze to best match the track of your patio door.
The Whiskers and Windows Cat Door for Sliding Glass Doors has a tools-free installation, making it perfect for apartments and vacation homes
The sliding glass door panel insert from Whiskers and Windows has a simple, easy installation process
The cat door panel insert has a spring-loaded design with a 3 inch adjustment range
Diagram showing how to measure your your sliding glass door track height, complete with a cross section of the sliding glass door track
The Whiskers and Windows cat door panel insert fits into the track of most sliding glass doors
The small flap fits cats up to ten pounds while the large flap fits cats up to fifteen pounds
The Whisker and Windows Cat Door for Sliding Glass Doors is perfect for cats and some very small dogs
The four-way locking system controls when you cat can go inside or outside for maximum security
The Whiskers and Windows Cat Door adjusts to fit the size of most sliding glass patio doors
A cat pushing up the clear, rigid flap in order to use the Whiskers and Windows Cat Door
The green and red tabs on the Whiskers and Windows cat flap control the settings of the four-way locking system
The Whisker and Windows is not electronic, so it does not require batteries or a collar key to operate

Whiskers & Windows Cat Door For Sliding Glass Door

Regular price
Sale price
Regular price
Sold out
Unit price

  • Fast, easy installation and removal with spring-loaded frame, no tools required
  • Adjustable height to fit most sliding doors (Measuring Guidelines in Details below)
  • Patio pet door panel comes with foam weather stripping for insulation
  • Aluminum frame in black or white and plastic pet door are durable and corrosion resistant
  • Perfect for cats and very small dogs

The Whiskers and Windows Cat Door Panel is a quick, affordable way to give your cat or small dog access to the backyard. This sliding glass door insert doesn't require drilling or cutting, so it installs in seconds! The ingenious spring-loaded design allows for an adjustment of up to 3 inches, with 2 adjustment ranges to choose from. Foam weatherstripping is included to ensure a snug seal from the elements around the panel. This pet door comes in white and black color options, ensuring that it will match your sliding glass door framing. Great for cats and very small dogs, this pet door will give you and your little furry buddies the freedom to come and go. Small and Large pet doors have a 4-way lock to provide security and access control. Use the red and green locking tabs to close it so nothing can enter or exit, allow access freely in and out, allow the pet to come in only and not go back out, or out only so they can't come back in until you let them.


    • Simple, speedy installation
    • No tools make these perfect for rentals
    • Adjustments fit most siding doors
    • Small flap fits most cats up to 10Lbs, while Large accommodates cats and small dogs up to 15Lbs
    • 4-way locking to control pets access

Measure to ensure proper fit:

1. Height and Width of your pet: This pet door opening for the small is 6" wide x 6" tall. The large is a little bigger at 7" wide x 7 3/4" tall. Be sure to include the 2 1/4" inch stepover when calculating opening height.

2. Height of sliding glass door track: Measure inside your track from the deepest point on the bottom to the deepest point up inside the top. Choose the size that will fit between 74 3/4" - 77 3/4" or 77 1/4" - 80 1/4".

3. Width of window opening: Your window must be able to open 13" wide for the small size and 15 1/2" wide for the large size.

4. Track thickness: must be at least 1" thick. It will fit in wider tracks but may need to be secured.

Size Chart

Flap SizeFlap DimensionStep Over HeightOverall Panel WidthStock No 
Small6"w x 6"h2"13"01PPC25S 
Large7"w x 7 3/4"h2"15 1/2"01PPC25L 

Adjustment Ranges

  • 74¾" - 77¾"
  • 77¼" - 80¼"

Pet door has 1" framing, measure your track width to make sure that your window will accommodate the panel.


How big of a dog can go through this?

The Large Flap would accommodate a dog about 15Lbs, and no more than 10" at the shoulder.

Can you lock it?

Yes, it has a 4-way lock with means you have 4 different access options. You can set it for totally locked, so nothing can go in or out. Open, so they can go in and out as the please. In only, so that once they come in they can't go back out until you let them. Or out only, so once the exit they will need you to let them back in.

Is the flap see through?

It is tinted, but you can easily see through it.

Is it hard for pets to use?

It does not require much force so it will be easier for smaller pets to use.


How to Measure Your Sliding Glass Door for a Pet Door


Whiskers and Windows Warranty

the manufacturer
guarantees your purchase for a period of one year from the date of original purchase against any defect arising due to faulty materials or manufacture. Accordingly any defective item will be repaired free of charge or replaced at the manufacturers option provided that the defect has not been caused by neglect, misuse or normal wear and tear and proof of purchase date is supplied.  Your statutory rights are not affected.

Installation Instructions

Quick Video on Installing the Panel

To Install the Whiskers and Windows Cat Door Panel

Step 1: Release the automatic height adjustment by turning the knobs located near the top of panel counter-clockwise and pressing. The height adjustment panel should fully extend upward (pull up on panel if necessary).

Step 2: Open the sliding glass/screen door.

Step 3: Insert the cat door with the knobs facing inside. Place the top edge into the top track of the sliding glass/screen door. Lift up and swing the lower portion of the panel onto the ridge in the sliding glass door (or screen door).

Step 4: Slide the Whiskers door against the door jamb. Make sure that top is fully extended (not tilted to one side) and the bottom of the panel is on the ridge in the bottom track.

Step 5: Hand-tighten the knobs by turning clockwise to lock the sliding glass pet door in place.

Additional Information

Frame Material


Flap Material


Flap Colors


Dual or Single Pane

Single Pane 3/16" Thick

Your Maximum Pet Size

Cats, Large Cats, Small Dogs

Climate Suitability

Temperate-3 Season

Flap Design


Can Be Installed In

Single Pane Glass Sliding Glass Door

Sealing Value


Wind Resistance


Insulation Value