Tunnels are available in 10 and 16 lengths for all 11 standard sizes of Hale pet doors. Oversize tunnel lengths are also available (please get in touch with us directly). If needed, we can also make a custom size tunnel for your pet door. If you are purchasing the parts necessary to convert an existing door model into a wall model, we recommend you order a tunnel, flashing, carpet and a raincap . NOTE: photo shows tunnel with one frame attached. Tunnel will be shipped by itself.