We'll always be there to get the door for your best friend, no matter the weather. The PetSafe Extreme Weather Sliding Glass Pet Door is our most energy-efficient pet door option for sliding glass doors. The dual-paned glass, weather stripping and 3 flexible flaps with a magnetic seal help keep the hot or cold weather out and the air conditioning or heat in for increased energy-efficiency. Available in 2 sizes, this door is a great option if you live in an apartment or rental home because it can be easily installed without cutting or drilling into your sliding glass door frame. The pet door arrives in 2 sections with a top and bottom panel. Simply attach the panels together and insert the pet door into your sliding glass door track. The pet door has a spring-loaded height adjustor to ensure it properly fits in place. Secure the pet door using either the included removeable adhesive strips or screws. To lock your sliding glass door, place the security bar between your door frame and the interior sliding portion of your glass door. Simply unhook the security bar from the bracket to unlock your sliding glass door. When your pet isn't using the door, slide the closing panel over the pet door opening and lock it in place for extra security and energy efficiency. Soon your dog or cat will be able to freely explore the great outdoors with their own personal pet door! Trust PetSafe to keep your pet healthy, safe and happy.

• Energy Efficient - This energy-efficient sliding glass pet door has dual-paned glass, weather stripping and 3 insulating pet door flaps to keep the weather out and help optimize your energy bill
• Perfect for Renters - This pet door is easy to install and detach; uses the included adhesive strips so you can easily take it with you if you and your pet move
• Adjustable Fit - The pet door easily installs into your existing sliding glass door track and the height automatically adjusts to ensure a proper fit
• 3 Flaps Installed - Pet door includes 3 flexible flaps with a magnetic seal to insulate against the outdoor weather
• Security Lock - To lock your door, mount the included security bar between your door frame and the interior sliding panel of your glass door
• 2 Installation Options - You choose whether to secure the pet door in place with adhesive or the included screws
• Medium Size - Best for pets up to 40 lb.; Door flap opening measures 8 1/4 in. W X 12 1/4 in. H; Door overall measures 11 1/2 in. WX 80 7/8 in. H with a rise measuring 1 1/4 in. H
• Large Size - Best for pets up to 100 pounds; Door flap opening measures 10 1/4 in W X 16 1/4 in H; Door overall measures 13 1/2 in W X 80 7/8 in H with a rise measuring 3 13/16 in H