Four-way lock Four modes (entry only, exit only, entry and exit, door closed) can be easily controlled by the door handle. Pet Body SizeInner size: 18 x 19.5cm (W x H), suitable for cats under 60cm to easily pass through the cat flap. The nature of pets is to seek freedom, but sometimes the door limits their freedom of personality, so it is very important to create an exclusive pet door. The four-way locking system allows the cat flap to have multiple locking modes so you can control the cat's access according to your needs. Magnetic buckles and brush strips ensure that the cat flap silently returns to its original position after use. Made of ABS material, this magnetic cat flap is durable enough to withstand long-term use and extreme weather conditions. External dimensions: 18cm (W) x 19.5cm (H) Inner size: 23.5cm (W) * 27cm (H) Thickness: 5.5cm Material: ABS plastic Suitable for cats whose height is below 60cm, please measure your cat's height