"PET SAFE" MEDIUM ALUMINUM PET DOOR *For pets up to 40 lbs. *10-7/8" x 15-3/4" overall dimensions *8-1/8" x 11-3/4" flap opening *Fits door from 3/8" to 2" thick *0.8mm aluminum walls *White enamel finish *Soft transparent single flap *Double track metal closing panel can be installed either side *Weather strip seal *Limited lifetime warranty *Boxed *Discovery ACC