The Ideal Original is an economical, plastic-framed utility pet door that will fit most standard doors. The flap on this pet door is a flexible, vinyl flap with a magnetic strip across the bottom of the flap to aid in closure. The flap itself is easily replaced by removing screws along the top of the flap. The pet door also comes with a slide-in plastic locking panel that allows you to secure the pet door when it is not in use.