The MidWest Universal Pet Playpen Extension Kit lets you expand your pet's existing play space without purchasing a brand-new pen. This handy kit comes with two 2-foot panels designed to fit most standard playpens and exercise pens (sold separately). Once connected, they can expand your pet’s space by four square feet, providing extra area for your best friend to run, frolic and play. The extension panels install easily without tools using four thumb-snaps and they feature a protective e-coat for a long-lasting shine. Available in several sizes to fit a variety of exercise pens, this extension kit makes it easy to give your pal the extra space he deserves!