- Size and applications: Frame size 9.6" x 8" x 1.2" (H x W x D). Inner height 5.9" and inner door width 5.8". Door cover size. With the cat tunnel, it can be easily installed in windows, doors, cabinets, panels and thin walls. - Safe and thoughtful design: Transparent flap lets pets see through. The 4-way locking cat flap gives cats freedom while letting you control access. Modes include Only In, Only Out, In and Out, and Fully Locked. - High quality and weather resistant: Made of weather-resistant ABS plastic with a smooth, durable surface. A fixed groove with snap tabs holds weatherproof brush strips that fix the brush bar. If a brush strip loosens, it can be reinserted into the groove. The brush strip helps reduce noise and largely blocks raindrops, wind and pests such as mosquitoes. - Easy to switch modes: Rotary switch offers four settings: Just Out, Only In, Both In and Out, and Fully Locked. This makes it simple to monitor your pets’ access and keep them safe while they move freely. - Use scenarios: - Install in a window or exterior wall to give your cat outdoor access via a tunnel, ideal for sun and fresh air. - Fit in a door or thin wall to create a controlled passage between rooms, a balcony, or patio, allowing indoor/outdoor access without opening the main door. - Place in cabinets or panels where a discreet internal cat door is needed, maintaining room aesthetics while providing pet access.