Keep the dogs in or out, with this replacement Masonite lock-out panel for Pride pet doors. All Pride Lock out panels are 1/8 thick. Replacement lock-out panel for the Pride Door Extra Large. Medium Pride Masonite Closing Panel for MD400 - Medium Door Large Pride Masonite Closing Panel for LD400 - Large Door X-Large Pride Masonite Closing Panel for XLD600 - X Large Door