PetSafe Deluxe Patio Door Panel Medium

Let your pet let itself out Features:Installs in left or right closing sliding glass doorsHeavy duty aluminum constructionUltra Seal all weather, energy conserving flexible flap system reduces energy lossInsulated and locking closing panelSpring loaded height adjusts automatically from 76 3/4 to 81 Shatter resistant, tempered safety glassLatch lock assembly enables sliding glass door to lockIncludes glass sweep and weatherstrippingFor pets up to 40 lbs.Flap opening is 8 X 11 Closing panel is made of plastic