?? 4 WAY LOCKING : The cat door with lock have 4 switch modes, the pet doors for cats could be adjusted by the red and green switches with tabs, can be set to open, in only, out only or fully locked, easily adjustable making it easy to keep your pets in or out ?? EASY TO INSTALL : The cat doors for interior doors have detailed installation steps, this small pet door can be installed easily in a short time. 8 screws and its caps included in the set make you easily install in doors, cupboards, panels and walls, etc ?? SAFE&THOUGHTFUL: The cat door with lock have transparent cat flap that cat can see through. The pet doors for cats have silent brush that can reduce the noise from the door closing. 4 way locking of the small cat door meets cat"s daily need. The cat flap door with magnet that let the flap can be quickly reset when the cat passes. Inner frame edge of the cat interior door get polished, so as not to hurt cat ?? SIZE : The small pet door is made of ABS material, weather-resistant, the surface is smooth and durable. The inner size of mini cat door is 5.71" (W) x 5.91" (H). It"s suitable for Weight< 1 5.43 lb Waist Circumference< 1 5.75" The outer size of thin cat door is 7.48" (W) x 7.68" (H) x 2.09" (D) ?? 100% SATISFACTION GUARANTEE : We guarantee you will love this small pet door, but if you do not satisfied with Our medium cat door, please contact us, tiny cat door which we provide not only 100% REFUND GUARANTEE, but also with 12 hours customer service. No questions asked About shlpping: All items will be shlpped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and we'll make you feel satisfied.