These are two 32" high xpens from BestPet. I purchased them from Amazon. They're metal and over 26 square feet each. https://www.amazon.com/gp/product/B003XU0B62/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1 Note that they're quite heavy-duty (and just plain heavy, at 20kg each). You can get shorter or taller sizes; I chose the 32" height to ensure they wouldn't get injured attempting to climb or jump over a 24" panel (and 40" was just too tall).