Product Description External dimensions (L x W x H): 19 x 21.5 x 5.5 cm Internal dimensions (L x W x H): 16 x 15.7 x 5.5 cm Suitable for weight under 7 kg and waist circumference less than 40cm Note 1).Make sure the width and pet’s height (shoulder level) are smaller than the pet screen door, thanks. 2) The magnet at the bottom of the door frame is for aligning the glass after moving it, it cannot be used as a lock, thank you. Product enhancements: 1. Convenient push-button switches, you can easily control your chat or other chat in or out options, just at your fingertips. Entrance, entrance, entrance and entrance. Exit, fully locked. 2. The retainer slot with lugs is etched, the pressure of the waterproof wiper strip greatly helps to fix it. 3. The depth of the tunnel can be reduced, 1 pack of lengthened screws + 1 pack of short screws, double-sided tape, to meet the needs of the tunnel. According to your needs, install on various types of interior doors, exterior doors, walls,
