Give your pets the freedom to let themselves out. The PetSafe Sliding Glass Pet Doors assemble easily to fit into sliding patio doors from 76.81-81 tall with a 0.75 track. When pets want to step outside theyll be free to simply walk through the flexible, tinted flap and walk back through when their done no more whining, barking or scratching to get your attention. Included latches enable you to lock your sliding glass door with the pet door installed. Weather stripping, glass sweep and closing panel add weather resistance. Doors fit both left or right sliding glass doors. Kit includes: PetSafe Sliding Glass Pet Door, foam weather stripping, glass sweep, four flathead screws, six sheet-metal screws, two latch assemblies and installation guide. Available: Small, Medium, Large. Small: Up to 15-lb. dog 5.25 x 8.19 opening. Medium:Up to 40-lb. dog 8.34 x 13.19 opening. Large:Up to 100-lb. dog 10.25 x 16.38 opening. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Pet Doors.