Whiskers & Windows Cat Door For Sliding Glass Door Easy No Tools Flap is the Ultra-Flex model:

Flap is the Ultra-Flex model: made up of three rigid panels joined together by flexible rubber and chew-resistant durable lexan material

Maximum glass size is 34" wide x 92" high (Measurement and installation (video) requires a professional glazier)

Please note that if you need both PetSafe Extreme Weather pet door replacement flaps (does not replace inner flap) or Wall Entry Door flaps

One of the most distinguishing features of the VIP sliding glass doggie door insert is the ability to lock with your existing doors

Includes a pin lock to secure your door

Whiskers & Windows Cat Door For Sliding Glass Door Easy No Tools Flap is the Ultra-Flex model:Fast, easy installation and removal with spring loaded frame 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 Flap is lockable 4 ways ( Unlocked both tabs center Locked both tabs outside Out only both tabs to right In only