If Sparky has a lot of life in him, you may want to consider giving him a place he can safely burn off some of that extra energy. The Midwest Black Exercise Pen without Door is just the thing. This metal pen has a durable, E-coat finish for long-lasting protection against corrosion and rust. It can be used indoors or out and includes ground anchors for securing it in place. Available in several sizes to suit the smallest and largest of breeds, this pen even folds flat for easy, convenient storage. You don"t even need any tools to set it up. What could be easier? 24-Inch Exercise Pen: Number of panels: 8 Panel size (ea): 24W x 24H inches Panel weight (ea): 21 lbs. Suitable for dogs: 1 to 25 lbs. 30-Inch Exercise Pen: Number of panels: 8 Panel size (ea): 24W x 30H inches Panel weight (ea): 24 lbs. Suitable for dogs: 26 to 40 lbs. 36-Inch Exercise Pen: Number of panels: 8 Panel size (ea): 24W x 36H inches Panel weight (ea): 29 lbs. Suitable for dogs: 41 to 70 lbs. 42-Inch Exercise Pen: Number of panels: 8 Panel size (ea): 24W x 42H inches Panel weight (ea): 33 lbs. Suitable for dogs: 71 to 90 lbs. 48-Inch Exercise Pen: Number of panels: 8 Panel size (ea): 24W x 48H inches Panel weight (ea): 37 lbs. Suitable for dogs: 91 lbs. and up About Mid-West Metal Products In 1921, Mid-West Metal Products made only one item, a Kruse Switch Box Support, and over the years began manufacturing millions of wire and sheet metal component parts. By 1960, they were producing training crates for pets. Today, Midwest Homes for Pets, a division of Mid-West products. These products include dog crates, training puppy crates, dog kennels, cat playpens, bird cages, vehicle barriers, soft-sided carriers, grooming tables and much more. They also manufacture a full line of pet accessories like beds and feeding dishes. * Metal exercise pen gives your dog room to stretch * Available in several sizes to suit any size dog * Black E-coat finish offers long-lasting protection * Includes ground anchors for use outdoors * Easy to set up; no tools are required * Great for a variety of pets and indoor use too * Folds flat for easy, convenient storage