Cat corridor door tunnel - Lets your cat pass through interior doors and gives it the freedom to come and go with a 4-way locking cat flap. Also suitable for small dogs. - Size - External dimensions: 20 cm high x 19.2 cm wide x 5.5 cm thick - Inner size: height 16 cm x door width 15.7 cm - Use range: weight under 14 kg; waist circumference under 40 cm - 4 locking modes for flexible control 1) Door locked from both sides 2) Flap fully open for unrestricted in-out 3) Cat can only enter from outside, cannot go back in 4) Cat can go out but cannot re-enter (also helps prevent entry by other cats) - Visibility and noise reduction - Transparent flap lets the pet see through the door - Outer umbrella is waterproof - Brush strip reduces noise when closing the door - Use scenarios - In a multi-room home to allow your cat access to living areas while you keep other rooms closed off - To control pet access in shared spaces (eg. keep doors open during the day, close at night) - Suitable for households with small dogs or multiple cats, using mode 3 or 4 to manage entry and prevent unwanted access - Material and performance notes - Designed for interior doors - Combines visibility, weather-resistance for the flap area, and quiet operation through the brush strip