Sliding Glass Door Doggie Door Insert; Fits Track Width Minimum 0.8" -- The Meulbaty aluminum-framed patio pet door insert for sliding glass doors, which fits tracks at least 0.8" thick. Follow the step-by-step instructions and video guide on the product page. If you have any questions, our customer service team is ready to assist you. Adjustable Height Extensions -- Our sliding glass dog door includes height extensions for a flexible and secure fit with most standard sliding glass door sizes. Four adjustable height options are available. Choose the size that best matches your door frame for a seamless fit. Dog Door Dimensions -- With a generous pet door opening of 55×33 cm (21.65" x 13.78")and a step-over height of 3.94", pets of all sizes—including small dogs, cats, and larger breeds—can easily pass through. Your furry friends will enjoy the freedom to move in and out comfortably and safely. Lockable Dog Door -- Keep your home safe and secure with the built-in lock feature on our pet door. This convenient locking system ensures your sliding door remains secure when the pet door is not in use. Easy Installation and Removal -- Our doggie door for sliding doors features a spring-loaded top for quick setup and removal. Install it without cut or property damage, making it perfect for apartments and rental homes. When it's time to move, simply remove the pet door and restore your sliding door to its original condition. dog door doggy door dog door for sliding glass door doggie door pet door doggy door for sliding glass doors large dog door doggie door for sliding glass door sliding door dog door insert dog doors cat door for sliding glass door pet door for sliding glass door xl dog door sliding glass door doggie door insert sliding door dog door door with doggie door built in pet doors for cats extra large dog door large dog door for exterior doors exterior door with pet door built in small dog door dog door for door sliding glass dog door dog doors for large dogs pet doors for dogs exterior door with built in pet door sliding glass door dog door doggie doors sliding door doggy door sliding glass pet door dog door sliding glass door doggy doors dog door for sliding door dog door large doggie doors for large dogs large dog door for sliding glass door pet doors sliding door pet door insert large doggy door xxl dog door sliding glass dog door insert cat proof doggy door sliding door cat door insert xl dog door for sliding glass door dog doors for exterior doors sliding glass door dog doors for sliding glass doors