Product description External size (L x W x H): 19 x 21.5 x 5.5 cm Internal size (L x W x H): 16 x 15.7 x 5.5 cm It is suitable for cats weighing less than 7 kg and with a waist circumference of less than 40 cm. Note 1). Please make sure the width and height (at shoulder height) of the animal are less than the pet screen door, thank you. 2) The magnet at the bottom of the door frame is for aligning the panel after moves, it doesn’t work as a lock, thanks. Enhanced Product Features: 1. Convenient button-style switch, you can easily control your chat or other chat input or output options, just at your fingertips. the entrance, in the entrance, in the entrance and in the entrance. exit, totally closed. 2. Fixed slot with tabs for agrave; pressure for a weather resistant brush strip goes a long way to fix it. 3. The depth of the tunnel can be reduced, plus 1 pack of long screws + 1 pack of short screws, double-sided tape, to meet the requirements of the tunnel. your needs, which are