The door should be fixed with the accessories provided for this purpose and opened according to the classic curtain system. They can provide a safe and effective shelter in bad weather, especially in cold weather, or when you just want to make the safer kennel. Transparent plastic door Average size Outer size: height 20cm * width 19cm * thickness 5.5cm inner size: height 16cm * width 15.7cm Easy installation using specific hooks Provide better protection in extreme weather conditions, especially cold climates