Material:plasticOrigin:Mainland China Type:cats Features: 100% brand new and high quality. Cat and dog doors, plastic pet doors. The outer sealing ring prevents rain and water from entering. There are 3 sizes, and there is always one size that fits your pet. Easy to install and fits all doors, panels and walls. Material: ABS Color: Black, White Suitable for: Dogs and cats Installation method: Tools required: Electric drill, iron saw or chainsaw, measuring ruler Step1: First draw the dimensions of the door cover with a piece of paper (there may be a few millimeters of error). Step2: The drawing makes good compare on the door is good, draw good mark with pencil. Step3: The 4 corners of the door that draw good drill a hole first respectively, begin to dig a hole directly if have electric saw next. Step4: If it is a glass door, use a tool to scratch the glass, gently scratch it open and fix it with glass glue. Step5: The hole was pulled out, do a layer of wood skin to wrap around the hole first now, for beautiful. Step6: Install cat door, have accessory screw, screw with screwdriver. Step7: Screw mouth still has screw cover, it is ok to press. Outer door frame size: M: 19*19.7*5.3cm L: 25*23.5*5.3cm XL: 25* 5.5*27.7cm Inner door frame size: M: 16*15.7cm L: 19*18cm XL: 22*20cm Package included: 1 x Pet Door Do dropshipping ? Yes,we do.If you have any question please contact us. Production Material Safety? All products are 100% brand new, workable and checked carefully before sending out. When is the parcel sent? We will send out order within 5 workdays. The delivery time will vary according to different countries and will be affected by weather, public holidays and so on. If order doesn't received in declare time, please contact us. How about refund? Full refund if the item does not match the description or defective. If there are any other problems , Click on Help