Richell Mobile Pet PenThis beautifully crafted mobile pen is loaded with safety features! From the slide-locking system on door and wire top, to the lockable base and casters, you can be assured your pet will be safe and secure in his/her "own" special space. Removable wire top provides easy pet access, as well as the front wire door. Casters allow you to move the pen from one location to another without the hassles. Plastic base removes easily for cleaning.Dimensions: Model 640- 25.2"L X 18.1"W X 22.4"H, for dogs 8-18 pounds.Dimensions: Model 940- 36.8"L X 24.2"W X 26"H, for dogs 8-44 pounds.....