Lockable Door Bolt:You can even lock the door to prevent your pets go out at night or when you are not at home.Easy to Install & Use: Our dog screen door is easy to install. You can install it by your own. It's also easy for your beloved pets to push or close.Sturdy & Durable: Made of high quality ABS material. Screws reinforcement makes our pet screen door sturdy enough and never easily fell apart. It can last for long time.How To Measure Your Pets?Measure Width : Measure the widest part of your pet(chest or hips) add 1.52Measure Height : Measure your pet from the top of the shoulders to the bottom of the chest or belly, whichever length is greater, Add 1.52Select Door Size : Based on your measurements, select the correct size,may suitable for the Cats and Dogs,0~55lbsSpecifications:Durable enough to prevent Pets BiteMake of Durable ABS Material and Nylon Mesh ,which can Effective Resist Your Pets' Bite or Sharp ClawAnti-UVIt can effectively block strong ultraviolet raysPlunger lockerEasy to install and can prevent your pets walk out,won't be easy to break offSturdy & DurableScrews reinforcement makes our pet screen door sturdy enough and never easily fell apart. It can last for long time.