Sold individually. Each replacement is a two-piece set: the center flap and a U-shaped retainer. Replaces worn, torn, or cracked flaps on Dragon pet doors. Translucent polyolefin elastomer. Flexible enough for pets to push through easily. Installs without removing the pet door frame from the door or wall. Available in Small, Medium, and Large (while supplies last). The Dragon Replacement Flap is a swap-in replacement for the flap on a Dragon pet door. If the original flap has worn, torn, or cracked, this is the part to replace, not the whole door. The flap is a translucent polyolefin elastomer in a two-piece design: a center flap with a U-shaped retainer. Each replacement ships with all the hardware needed for the swap, and you do not have to remove the pet door frame from your door or wall to do it. This flap fits every Dragon pet door installation type, including standard doors, wall mounts, aluminum and vinyl sliding doors, sash windows, vinyl windows, and horizontal windows. Features: Two-piece design with center flap, U-shaped retainer, and all hardware included. Translucent polyolefin elastomer flap. Durable and easy for pets to push through. Installs without removing the existing pet door frame. Compatible with every Dragon mount type: doors, walls, slider panels, and window inserts.