PlexiDor In Wall Mount Performance Cat & Dog DoorDescription PlexiDor In Wall Mount Performance Cat & Dog Door The Plexidor offers a unique and attractive pet door. The PlexiDor uses 2 dual pane hardened acrylic flaps which swing open from the center like a saloon door (extra large uses two single pane flaps, small uses a single dual pane flap). Rigid flaps are easier to seal than flexible vinyl. Pile weather stripping around the flap is used to seal it to the frame. The doors are spring loaded to