Guardian Gear ProSelect Crate Appeal Exercise Pen for Dogs and Pets - Black; Extra Small These economical exercise pens are sure to be a hit with pets and budget-conscious pet parents alike! Ideal for show, travel, and at-home use Closely spaced epoxy-coated wire offers rigidity and security Features eight interlocking panels that can be arranged in a variety of configurations Also available in Extra Small, Small, Medium, Large, and Extra Large sizes