Product Description External size (L x W x H): 23.5 x 27 x 5.5 cm Internal size (L x W x H): 19.5 x 18 x 5.5 cm It is suitable for cats of a weight less than 8 kg and at a waist circumference less than 60cm. Note: 1). Make sure the width and height (at the shoulders) of the animal are less than the pet screen door, thank you. 2) The magnet at the bottom of the door frame is for align pane after moves, it doesn’t work as a lock, thanks. Product Enhanced Features: 1. Convenient button-style switch, you can easily control your chat or other chat input or output options, only at your fingertips. the entrance, at the entrance, at the entrance and at the entrance. exit, totally locked. 2. The fixed groove with tabs to agrave; pressure for a weatherproof brush strip greatly helps to fix it. 3. The depth of the tunnel can be reduced, plus 1 pack of long + 1 pack of short screws, double-sided adhesive tape, to meet the needs of the tunnel. your needs, which install in different types of